AMERICAN INDUSTRIAL REAL ESTATE ASSOCIATION
                                   AIR (LOGO)

1. Parties. This Lease, dated, for reference purposes only. October 12, 1992, is
made by and between VIRGINIA MERRITT, as Trustee of the Bowman Merritt and
Virginia Merritt Trust, (herein called "Lessor") and XOMA CORPORATION (herein
called "Lessee").

2. Premises. Lessor hereby leases to Lessee and Lessee leases from Lessor for
the term, at the rental, and upon all of the conditions set forth herein, that
certain real property situated in the County of Los Angeles State of California,
commonly known as 1545 17th Street, Santa Monica, California and described as
Approximately 18,000 sq. ft., building on site, more specifically described as
Lots O and P, Block 182, Town of Santa Monica, as recorded in Miscellaneous
Records, Book 39, Page 45, et seq., in the Office of the County Recorder of Los
Angeles County, California. Said real property including the land and all
improvements therein, is herein called "the Premises".

3.  Term.

         3.1 Term. The term of this Lease shall be for Five (5) years commencing
on October 12, 1992 and ending on October 12, 1997 unless sooner terminated
pursuant to any provision hereof.

         3.2 Delay in Possession. Not withstanding said commencement date, if
for any reason Lessor cannot deliver possession of the Premises to Lessee on
said date, Lessor shall not be subject to any liability therefor, nor shall such
failure affect the validity of this Lease or the obligations of Lessee hereunder
or extend the term hereof, but in such case, Lessee shall not be obligated to
pay rent until possession of the Premises is tendered to Lessee; provided,
however, that if Lessor shall not have delivered possession of the Premises
within sixty (60) days from said commencement date, Lessee may, at Lessee's
option, by notice in writing to Lessor within ten (10) days thereafter, cancel
this Lease, in which event the parties shall be discharged from all obligations
hereunder; provided further, however, that if such written notice of Lessee is
not received by Lessor within said ten (10) day period, Lessee's right to cancel
this Lease hereunder shall terminate and be of no further force or effect.

         3.3 Early Possession. If Lessee occupies the Premises prior to said
commencement date, such occupancy shall be subject to all provisions hereof,
such occupancy shall not advance the termination date, and Lessee shall pay rent
for such period at the initial monthly rates set forth below.

4.  Rent:  Special Net Lease.

         4.1 Rent. Lessee shall pay to Lessor as rent for the Premises, monthly
payments of $18,000.00, in advance, on the first day of each month of the term
hereof. Lessee shall pay Lessor upon the execution hereof $18,000.00 as rent for
the month of (See Addendum). Rent for any period during the term hereof which is
for less than one month shall be a pro rata portion of the monthly installment.
Rent shall be payable in lawful money of the United States to Lessor at the
address stated herein or to such other persons or at such other places as Lessor
may designate in writing.

         4.2 Special Net Lease. This Lease is what is commonly called a "Net,
Net, Net Lease", it being understood that the Lessor shall receive the rent set
forth in Paragraph 4.1 free and clear of any and all other impositions, taxes,
liens, charges or expenses of any nature whatsoever in connection with the
ownership and operation of the Premises. In addition to the rent reserved by
Paragraph 4.1, Lessee shall pay to the parties respectively entitled thereto all
impositions, insurance premiums, operating charges, maintenance charges,
construction costs, and any other charges, costs and expenses which arise or may
be contemplated under any provisions of this Lease during the term hereof. All
of such charges, costs and expenses shall constitute additional rent, and upon
the failure of Lessee to pay any of such costs, charges or expenses, Lessor
shall have the same rights and remedies as otherwise provided in this Lease for
the failure of Lessee to pay rent. It is the intention of the parties hereto
that Lessee shall in no event be entitled to any abatement of or reduction in
rent payable under this Lease, except as herein expressly provided. Any present
or future law to the contrary shall not alter this agreement of the parties.

5. Security Deposit. Lessee shall deposit with Lessor upon execution hereof
$25,144.00 (See Addendum) as security for Lessee's faithful performance of
Lessee's obligations hereunder. If Lessee fails to pay rent or other charges due
hereunder, or otherwise defaults with respect to any provision of this Lease,
Lessor may use, apply or retain all or any portion of said deposit for the
payment of any rent or other charge in default or for the payment of any other
sum to which Lessor may become obligated by reason of Lessee's default, or to
compensate Lessor for any loss or damage which Lessor may suffer thereby. If
Lessor so uses or applies all or any portion of said deposit, Lessee shall
within ten (10) days after written demand therefor deposit cash with Lessor in
an amount sufficient to restore said deposit to the full amount hereinabove
stated and Lessee's failure to do so shall be a material breach of this Lease.
Lessor shall not be required to keep said deposit separate from its general
accounts. If Lessee performs all of Lessee's obligations hereunder, said
deposit, or so much thereof as has not theretofore been applied by Lessor, shall
be returned, without payment of interest or other increment for its use, to
Lessee (or, at Lessor's option, to that last assignee, if any, of Lessee's
interest hereunder) at the expiration of the term hereof, and after Lessee has
vacated the Premises. No trust relationship is created herein between Lessor and
Lessee with respect to said Security Deposit.

6.  Use.

         6.1 Use. The Premises shall be used and occupied only for light
manufacturing, research laboratories, and office or any other use which is
reasonably comparable and for no other purpose.

         6.2  Compliance with Law.

                  (a) Lessor warrants to Lessee that the Premises, in its state
existing on the date that the Lease term commences, but without regard to the
use for which Lessee will use the Premises, does not violate any covenants or
restrictions of record, or any applicable building code, regulation or ordinance
in effect on such Lease term commencement date. In the event it is determined
that this warranty has been violated, then it shall be the obligation of the
Lessor, after written notice from Lessee, to promptly, at Lessor's sole cost and
expense, rectify any such violation. In the event Lessee does not give to Lessor
written notice of the violation of this warranty within six months from the date
that the Lease term commences, the correction of same shall be the obligation of
the Lessee at Lessee's sole cost. The warranty contained in this paragraph 6.2
(a) shall be of no force or effect if, prior to the date of this Lease, Lessee
was the owner or occupant of the Premises, and, in such event, Lessee shall
correct any such violation at Lessee's sole cost.

                  (b) Except as provided in paragraph 6.2(a), Lessee shall, at
Lessee's expense, comply promptly with all applicable statutes, ordinances,
rules, regulations, orders, covenants and restrictions of record, and
requirements in effect during the term or any part of the term hereof,
regulating the use by Lessee of the Premises. Lessee shall not use nor permit
the use of the Premises in any manner that will tend to create waste or a
nuisance or, if there shall be more than one tenant in the building containing
the Premises, shall tend to disturb such other tenants.

         6.3  Condition of Premises

                  (a) Lessor shall deliver the Premises to Lessee clean and free
of debris on Lease commencement date (unless Lessee is already in possession)
and Lessor further warrants to Lessee that the plumbing, lighting, air
conditioning, heating, and loading doors in the Premises shall be in good
operating condition on the Lease commencement date. In the event that it is
determined that this warranty has been violated, then it shall be the obligation
of Lessor, after receipt of written notice from Lessee setting forth with
specificity the nature of the violation, to promptly, at Lessor's sole cost,
rectify such violation. Lessee's failure to give such written notice to Lessor
within thirty (30) days after the Lease commencement date shall cause the
conclusive presumption that Lessor has complied with all of Lessor's obligations
hereunder. The warranty contained in this paragraph 6.3(a) shall be of no force
or effect if prior to the date of this Lease, Lessee was the owner or occupant
of the Premises.

                  (b) Except as otherwise provided in this Lease, Lessee hereby
accepts the Premises in their condition existing as of the Lease commencement
date or the date that Lessee takes possession of the Premises, whichever is
earlier, subject to all applicable zoning, municipal, county and state laws,
ordinances and regulations governing and regulating the use of the Premises, and
any covenants or restrictions of record, and accepts this Lease subject thereto
and to all matters disclosed thereby and by any exhibits attached hereto. Lessee
acknowledges that neither Lessor nor Lessor's agent has made any representation
or warranty as to the present or future suitability of the Premises for the
conduct of Lessee's business.

                                   SPECIAL NET

(This is a special form containing unique provisions and should only be used in
special situations where the LESSEE will pay rent under all circumstances and in
the event of destruction the LESSEE will rebuild under all circumstances.)
7.  Maintenance, Repairs and Alterations.

         7.1 Lessee's Obligations. Lessee shall keep in good order, condition
and repair the Premises and every part thereof, structural and non structural,
(whether or not such portion of the Premises requiring repair, or the means of
repairing the same are reasonably or readily accessible to Lessee, and as a
result of Lessee's use, the elements or the age of such portion of the Premises)
including, without limiting the generality of the foregoing, all plumbing,
heating, air conditioning, (Lessee shall procure and maintain, at Lessee's
expense, an air conditioning system maintenance contract) ventilating,
electrical, lighting facilities and equipment within the Premises, fixtures,
walls (interior and exterior), foundations, ceilings, roofs (interior and
exterior), floors, windows, doors, plate glass and skylights located within the
Premises, and all landscaping, driveways, parking lots, fences and signs located
on the Premises and sidewalks and parkways adjacent to the Premises.

         7.2 Surrender. On the last day of the term hereof, or on any sooner
termination, Lessee shall surrender the Premises to Lessor in the same condition
as when received, ordinary wear and tear excepted, clean and free of debris.
Lessee shall repair any damage to the Premises occasioned by the installation or
removal of Lessee's trade fixtures, furnishings and equipment. Notwithstanding
anything to the contrary otherwise stated in this Lease, Lessee shall leave the
air lines, power panels, electrical distribution systems, lighting fixtures,
space heaters, air conditioning, plumbing and fencing on the premises in good
operating condition.

         7.3 Lessor's Rights. If Lessee fails to perform Lessee's obligations
under this Paragraph 7, or under any other paragraph of this Lease, Lessor may
at its option (but shall not be required to) enter upon the Premises after ten
(10) days' prior written notice to Lessee (except in the case of an emergency,
in which case no notice shall be required), perform such obligations on Lessee's
behalf and put the same in good order, condition and repair, and the cost
thereof together with the interest thereon at the maximum rate than allowable by
law shall become due and payable as additional rental to Lessor together with
Lessee's next rental installment.

         7.4 Lessor's Obligations. Except for the obligations of Lessor under
Paragraph 6.2(a) and 6.3(a)(relating to Lessor's warranty), Paragraph 9
(relating to destruction of the Premises, and under Paragraph 14 (relating to
condemnation of the Premises), it is intended by the parties hereto that Lessor
have no obligation, in any manner whatsoever, to repair and maintain the
Premises nor the building located thereon nor the equipment therein, whether
structural or non structural, all of which obligations are intended to be that
of the Lessee under Paragraph 7.1 hereof. Lessee expressly waives the benefit of
any statute now or hereinafter in effect which would otherwise afford Lessee the
right to make repairs at Lessor's expense or to terminate this Lease because of
Lessor's failure to keep the premises in good order, condition and repair.

         7.5  Alterations and Additions

                  (a) Lessee shall not, without Lessor's prior written consent
make any alterations, improvements, additions, or Utility installations in, on
or about the Premises, except for nonstructural alterations not exceeding
$50,000.00 in cumulative costs during the term of this Lease. In any event,
whether or not in excess of $50,000.00 in cumulative cost, Lessee shall make no
change or alteration to the exterior of the Premises nor the exterior of the
building(s) on the Premises without Lessor's prior written consent. As used in
this Paragraph 7.5 the term "Utility Installation" shall mean carpeting, window
coverings, air lines, power panels, electrical distribution systems, lighting
fixtures, space heaters, air conditioning, plumbing, and fencing. Lessor may
require that Lessee remove any or all of said alterations, improvements,
additions or Utility Installations at the expiration of the term, and restore
the Premises to their prior condition. Lessor may require Lessee to provide
Lessor, at Lessee's sole cost and expense, a lien and completion bond in an
amount equal to one times the estimated cost of such improvements, to insure
Lessor against any liability for mechanic's and materialmen's liens and to
insure completion of the work. Should Lessee make any alterations, improvements,
additions or Utility Installations without the prior approval of Lessor, Lessor
may require that Lessee remove any or all of the same.

         (b) Any alterations, improvements, additions or Utility Installations
in, or about the Premises that Lessee shall desire to make and which requires
the consent of the Lessor shall be presented to Lessor in written form, with
proposed detailed plans. If Lessor shall give its consent, the consent shall be
deemed conditioned upon Lessee acquiring a permit to do so from appropriate
governmental agencies, the furnishing of a copy thereof to Lessor prior to the
commencement of the work and the compliance by Lessee of all conditions of said
permit in a prompt and expeditious manner.

         (c) Lessee shall pay, when due, all claims for labor or materials
furnished or alleged to have been furnished to or for Lessee at or for use in
the Premises, which claims are or may be secured by any mechanics' or
materialmen's lien against the Premises or any interest therein. Lessee shall
give Lessor not less than ten (10) days' notice prior to the commencement of any
work in the Premises, and Lessor shall have the right to post notices of
non-responsibility in or on the Premises as provided by law. If Lessee shall, in
good faith, contest the validity of any such lien, claim or demand, then Lessee
shall, at its sole expense defend itself and Lessor against the same and shall
pay and satisfy any such adverse judgment that may be rendered thereon before
the enforcement thereof against the Lessor or the Premises, upon the condition
that if Lessor shall require, Lessee shall furnish to Lessor a surety bond
satisfactory to Lessor in an amount equal to such contested lien claim or demand
indemnifying Lessor against liability for the same and holding the Premises free
from the effect of such lien or claim. In addition, Lessor may require Lessee to
pay Lessor's attorneys fees and costs in participating in such action if Lessor
shall decide it is to its best interest to do so.

         (d) Unless Lessor requires their removal, as set forth in Paragraph
7.5(a), all alterations, improvements, additions and Utility Installations
(whether or not such Utility Installations constitute trade fixtures of Lessee),
which may be made on the Premises, shall become the property of Lessor and
remain upon and be surrendered with the Premises at the expiration of the term.
Notwithstanding the provisions of this Paragraph 7.5(d), Lessee's machinery and
equipment, other than that which is affixed to the Premises so that it cannot be
removed without material damage to the Premises(which cannot thereby be restored
to their original condition, normal wear and tear excepted), shall remain the
property of Lessee and may be removed by Lessee subject to the provisions of
Paragraph 7.2.

8.  Insurance Indemnity.

         8.1 Insuring Party. As used in this Paragraph 8, the term "insuring
party" shall mean the party who has the obligation to obtain the Property
Insurance required hereunder. The insuring party shall be designated in
Paragraph 46 hereof. In the event Lessor is the insuring party, Lessor shall
also maintain the liability insurance described in paragraph 8.2 hereof, in
addition to, and not in lieu of, the insurance required to be maintained by
Lessee under said paragraph 8.2, but Lessor shall not be required to name Lessee
as an additional insured on such policy. Whether the insuring party is the
Lessor or the Lessee, Lessee shall, as additional rent for the Premises, pay the
cost of all insurance required hereunder, except for that portion of the cost
attributable to Lessor's liability insurance coverage in excess of $1,000,000
per occurrence. If Lessor is the insuring party Lessee shall, within ten (10)
days following demand by Lessor, reimburse Lessor for the cost of the insurance
so obtained.

         8.2 Liability Insurance. Lessee shall, at Lessee's expense obtain and
keep in force during the term of this Lease a policy of Combined Single Limit,
Bodily Injury and Property Damage insurance insuring Lessor and Lessee against
any liability arising out of the ownership, use, occupancy or maintenance of the
Premises and all areas appurtenant thereto. Such insurance shall be a combined
single limit policy in an amount not less than $500,000 per occurrence. The
policy shall insure performance by Lessee of the indemnity provisions of this
Paragraph 8. The limits of said insurance shall not, however, limit the
liability of Lessee hereunder.

         8.3  Property Insurance.

                  (a) The insuring party shall obtain and keep in force during
the term of this Lease a policy or policies of insurance covering loss or damage
to the Premises, in the amount of the full replacement value thereof, as the
same may exist from time to time, which replacement value is now $1.4 million,
but in no event less than the total amount required by lenders having liens on
the Premises, against all perils included within the classification of fire,
extended coverage, vandalism, malicious mischief, flood (in the event same is
required by a lender having a lien on the Premises), and special extended perils
("all risk" as such term is used in the insurance industry). Said insurance
shall provide for payment of loss thereunder to Lessor or to the holders of
mortgages or deeds of trust on the Premises. The insuring party shall, in
addition, obtain and keep in force during the term of this Lease a policy of
rental value insurance covering a period of one year, with loss payable to
Lessee, which insurance shall also cover all real estate taxes and insurance
costs for said period. A replacement value endorsement deleting the coinsurance
provision of the policy shall be procured with said insurance as well as an
automatic increase in insurance endorsement causing the increase in annual
property insurance coverage. If the insuring party shall fail to procure and
maintain said insurance the other party may, but shall not be required to,
procure and maintain the same, but at the expense of Lessee. If such insurance
coverage has a deductible clause, the deductible amount shall not exceed
$5,000.00 per occurrence, and Lessee shall be liable for such deductible amount.

                  (b) If the Premises are part of a larger building, or if the
Premises are part of a group of buildings owned by Lessor which are adjacent to
the Premises, then Lessee shall pay for any increase in the property insurance
of such other building or buildings if said increase is caused by Lessee's acts,
omissions, use or occupancy of the Premises.

                  (c) If the Lessor is the insuring party the Lessor will not
insure Lessee's fixtures, equipment or tenant improvements unless the tenant
improvements have become a part of the Premises under paragraph 7, hereof. But
if Lessee is the insuring party the Lessee shall insure its fixtures, equipment
and tenant improvements.

         8.4 Insurance Policies. Insurance required hereunder shall be in
companies holding a "General Policyholders Rating" of at least B plus, or such
other rating as may be required by a lender having a lien on the Premises, as
set forth in the most current issue of "Best's Insurance Guide". The insuring
party shall deliver to the other party copies of policies of such insurance or
certificates evidencing the existence and amounts of such insurance with loss
payable clauses as required by this paragraph 8. No such policy shall be
cancellable or subject to reduction of coverage or other modification except
after thirty (30) days' prior written notice to Lessor. If Lessee is the
insuring party Lessee shall, at least thirty (30) days prior to the expiration
of such policies, furnish Lessor with renewals or "binders" thereof, or Lessor
may order such insurance and charge the cost thereof to Lessee, which amount
shall be payable by Lessee upon demand. Lessee shall not do or permit to be done
anything which shall invalidate the insurance policies referred to in Paragraph
8.3. If Lessee does or permits to be done anything which shall increase the cost
of the insurance policies referred to in Paragraph 8.3, then Lessee shall
forthwith upon Lessor's demand reimburse Lessor for any additional premiums
attributable to any act or omission or operation of Lessee causing such increase
in the cost of insurance. If Lessor is the insuring party, and if the insurance
policies maintained hereunder cover other improvements in addition to the
Premises, Lessor shall deliver to Lessee a written statement setting forth the
amount of any such insurance cost increase and showing in reasonable detail the
manner in which it has been computed.

         8.5 Waiver of Subrogation. Lessee and Lessor each hereby release and
relieve the other, and waive their entire right of recovery against the other
for loss or damage arising out of or incident to the perils insured against
under paragraph 8.3, which perils occur in, on or about the Premises, whether
due to the negligence of Lessor or Lessee or their agents, employees,
contractors and/or invitees. Lessee and Lessor shall, upon obtaining the
policies of insurance required hereunder, give notice to the insurance carrier
or carriers that the foregoing mutual waiver of subrogation is contained in this
Lease.

         8.6 Indemnity. Lessee shall indemnify and hold harmless Lessor from and
against any and all claims arising from Lessee's use of the Premises, or from
the conduct of Lessee's business or from any activity, work or things done,
permitted or suffered by Lessee in or about the Premises or elsewhere and shall
further indemnify and hold harmless Lessor from and against any and all claims
arising from any breach or default

                                       -2-
in the performance of any obligation on Lessee's part to be performed under the
terms of this Lease, or arising from any negligence of the Lessee, or any of
Lessee's agents, contractors, or employees, and from and against all costs,
attorney's fees, expenses and liabilities incurred in the defense of any such
claim or any action or proceeding brought thereon; and in case any action or
proceeding be brought against Lessor by reason of any such claim, Lessee upon
notice from Lessor shall defend the same at Lessee's expense by counsel
satisfactory to Lessor. Lessee, as a material part of the consideration to
Lessor, hereby assumes all risk of damage to property or injury to persons, in,
upon or about the Premises arising from any cause and Lessee hereby waives all
claims in respect thereof against Lessor.

         8.7 Exemption of Lessor from Liability. Lessee hereby agrees that
Lessor shall not be liable for injury to Lessee's business or any loss of income
therefrom or for damage to the goods, wares, merchandise or other property of
Lessee, Lessee's employees, invitees, customers, or another person in or about
the Premises, nor shall Lessor be liable for injury to the person of Lessee,
Lessee's employees, agents or contractors whether such damage or injury is
caused by or results from fire, steam, electricity, gas, water or rain, or from
the breakage, leakage, obstruction or other defects of pipes, sprinklers, wires,
appliances, plumbing, air conditioning or lighting fixtures, or from any other
cause, except for Lessor's negligence or breach of an express warranty contained
in this Lease, whether the said damage or injury results from conditions arising
upon the Premises or upon other portions of the building of which the Premises
are a part, or from other sources or places and regardless of whether the cause
of such damage or injury or the means of repairing the same is inaccessible to
Lessee. Lessor shall not be liable for any damages arising from any act or
neglect of any other tenant, if any, of the building in which the Premises are
located.

9. Damage, Destruction, Obligation to Rebuild, Rent Abatement.

         9.1 Obligation to Rebuild. In the event that some or all of the
improvements constituting a part of the Premises or the Premises itself are
damaged or destroyed, partially or totally from any cause other than the acts or
omissions to act of Lessor, whether or not such damage or destruction is covered
by any insurance required to be maintained under Paragraph 8.3 hereof, then
Lessee shall repair, restore and rebuild the Premises to its condition existing
immediately prior to such damage or destruction and this Lease shall remain in
full force and effect. Such repair, restoration and rebuilding (all of which are
herein called "repair") shall be commenced within a reasonable time after such
damage or destruction has occurred and shall be diligently pursued to
completion, provided the damage or destruction was not caused by Lessor.

         9.2 Insurance Proceeds. The proceeds of any insurance maintained under
Paragraph 8.3 hereof shall be made available to Lessee for payment of costs and
expense of repair, provided however, that such proceeds may be made available to
Lessee subject to reasonable condition including, but not limited to architect's
certification of cost, retention of percentage of such proceeds pending
recordation of a notice of completion and a lien and completion bond to insure
against mechanic's or materialmen's liens arising out of the repair and to
insure completion of the repair all at the expense of Lessee. In the event the
insurance proceeds are insufficient to cover the cost of repair, then any
amounts required over the amount of the insurance proceeds received that are
required to complete said repair shall be paid by Lessee. In the event the
insurance proceeds are not made available to Lessee within 120 days after such
damage or destruction, Lessee shall have the option for 30 days commencing on
the expiration of such 120 day period, of cancelling this Lease. If Lessee shall
exercise such option, Lessee shall have no further obligation hereunder and
shall have no claim against Lessor. Lessee, in order to exercise said option,
shall exercise said option by giving written notice to Lessor within said 30 day
period, time being of the essence.

         9.3  Damage Near End of Term

                  (a) If the Premises are damaged or destroyed, either partially
or totally, during the last six months of the term of this Lease, Lessor may at
Lessor's option cancel and terminate this Lease as of the date of occurrence of
such damage by giving written notice to Lessee of Lessor's election to do so
within 30 days after the date of occurrence of such damage.

                  (b) Notwithstanding paragraph 9.3(a) to the contrary, in the
event that Lessee has an option to extend or renew this Lease, and the time
within which said option may be exercised has not yet expired, Lessee shall
exercise such option, if it is to be exercised at all, no later than 20 days
after damage or destruction to the Premises, either total or partial occurring
during the last six months of the term of this Lease, which damage or
destruction is covered by insurance required to be maintained under paragraph 8.
If Lessee duly exercises such option during said 20 day period Lessee shall, in
accordance with paragraph 9.2, at Lessee's expense, repair such damage as soon
as reasonably possible and this Lease shall continue in full force and effect.
If Lessee fails to exercise such option during said 20 day period, then Lessor
may at Lessor's option terminate and cancel this Lease as of the expiration of
said 20 day period by giving written notice to Lessee of Lessor's election to do
so within 10 days after the expiration of said 20 day period, notwithstanding
any term or provision in the grant of option to the contrary.

         9.4 Abatement of Rent. Notwithstanding the partial or total destruction
of the Premises and any part thereof, and notwithstanding whether the casualty
is insured or not, there shall be no abatement of rent or of any other
obligation of Lessee hereunder by reason of such damage or destruction unless
the Lease is terminated by virtue of any other provision of this Lease.

         9.5 Termination - Advance Payments. Upon termination of this Lease
pursuant to this Paragraph 9, an equitable adjustment shall be made concerning
advance rent and any payments made by Lessee to Lessor. Lessor shall, in
addition, return to Lessee so much of Lessee's security deposit as has not
theretofore been applied by Lessor.

         9.6 Waiver. Lessee waives the provisions of any statutes which relate
to termination of leases when the thing leased is destroyed and agrees that such
event shall be governed by the terms of this Lease.

10.  Real Property Taxes.

         10.1 Payment of Taxes. Lessee shall pay the real property tax, as
defined in paragraph 10.2, applicable to the Premises during the term of this
Lease. All such payments shall be made at least ten (10) days prior to the
delinquency date of such payment. Lessee shall promptly furnish Lessor with
satisfactory evidence that such taxes have been paid. If any such taxes paid by
Lessee shall cover any period of time prior to or after the expiration of the
term hereof, Lessee's share of such taxes shall be equitably prorated to cover
only the period of time within the tax fiscal year during which this Lease shall
be in effect, and Lessor shall reimburse Lessee to the extent required. If
Lessee shall fail to pay any such taxes, Lessor shall have the right to pay the
same, in which case Lessee shall repay such amount to Lessor with Lessee's next
rent installment together with interest at the maximum rate then allowable by
law.

         10.2 Definition of "Real Property Tax". As used herein, the term "real
property tax" shall include any form of real estate tax or assessment general,
special, ordinary or extraordinary, and any license fee, commercial rental tax,
improvement bond or bonds, levy or tax (other than inheritance, personal income
or estate taxes) imposed on the Premises by any authority having the direct or
indirect power to tax, including any city, state or federal government, or any
school, agricultural, sanitary, fire, street, drainage or other improvement
district thereof, as against any legal or equitable interest of Lessor in the
Premises or in the real property of which the Premises are a part, as against
Lessor's right to rent or other income therefrom, and as against Lessor's
business of leasing the Premises. The term "real property tax" shall also
include any tax, fee, levy, assessment or charge (i) in substitution of,
partially or totally, any tax, fee, levy, assessment or charge hereinabove
included within the definition of "real property tax," or (ii) the nature of
which was hereinbefore included within the definition of "real property tax," or
(iii) which is imposed for a service or right not charged prior to June 1, 1978,
or, if previously charged, has been increased since June 1, 1978, or (v) which
is imposed by reason of this transaction, any modifications or changes heretofor
any transfers hereof.

         10.3 Joint Assessment. If the Premises are not separately assessed,
Lessee's liability shall be equitable proportion of the real property taxes for
all of the land and improvement included within the tax parcel assessed, such
proportion to be determined by Lessor from the respective valuations assigned in
the assessor's work sheets or such other information as may be reasonably
available. Lessor's reasonable determination thereof, in good faith, shall be
conclusive.

         10.4  Personal Property Taxes.

                  (a) Lessee shall pay prior to delinquency all taxes assessed
against and levied upon trade fixtures, furnishings, equipment and all other
personal property of Lessee contained in the Premises or elsewhere. When
possible, Lessee shall cause said trade fixtures, furnishings, equipment and all
other personal property to be assessed and billed separately from the real
property of Lessor.

                  (b) If any of Lessee's said personal property shall be
assessed with Lessor's real property, Lessee shall pay Lessor the taxes
attributable to Lessee within 10 days after receipt of a written statement
setting forth the taxes applicable to Lessee's property.

11. Utilities. Lessee shall pay for all water, gas, heat, light, power,
telephone and other utilities and services supplied to the Premises, together
with any taxes thereon. If any such services are not separately metered to
Lessee, Lessee shall pay a reasonable proportion to be determined by Lessor of
all charges jointly metered with other premises.

12.  Assignment and Subletting.

         12.1 Lessor's Consent Required. Lessee shall not voluntarily or by
operation of law assign, transfer, mortgage, sublet, or otherwise transfer or
encumber all or any part of Lessee's interest in this Lease or in the Premises,
without Lessor's prior written consent, which Lessor shall not unreasonably
withhold. Lessor shall respond to Lessee's request for consent hereunder in a
timely manner and any attempted assignment, transfer, mortgage, encumbrance or
subletting without such consent shall be void, and shall constitute a breach of
this Lease.

         12.2 Lessee Affiliate. Notwithstanding the provisions of paragraph 12.1
hereof, Lessee may assign or sublet the Premises, or any portion thereof,
without Lessor's consent, to any corporation which controls, is controlled by or
is under common control with Lessee, or to any corporation resulting from the
merger or consolidation with Lessee, or to any person or entity which acquires
all the assets of Lessee as a going concern of the business that is being
conducted on the Premises, provided that said assignee assumes, in full, the
obligations of Lessee under this Lease. Any such assignment shall not, in any
way, affect or limit the liability of Lessee under the terms of this Lease even
if after such assignment or subletting the terms of this Lease are materially
changed or altered without the consent of Lessee, the consent of whom shall not
be necessary.

         12.3 No Release of Lessee. Regardless of Lessor's consent, no
subletting or assignment shall release Lessee of Lessee's obligation or alter
the primary liability of Lessee to pay the rent and to perform all other
obligations to be performed by Lessee hereunder. The acceptance of rent by
Lessor from any other person shall not be deemed to be a waiver by Lessor of any
provision hereof. Consent to one assignment or subletting shall not be deemed
consent to any subsequent assignment or subletting. In the event of default by
any assignee of Lessee or any successor of Lessee, in the performance of any of
the terms hereof, Lessor may proceed directly against Lessee without the
necessity of exhausting remedies against said assignee. Lessor may consent to
subsequent assignments or subletting of this Lease or amendments or
modifications to this Lease with assignees of Lessee, without notifying Lessee,
or any successor of Lessee, and without obtaining its or their consent thereto
and such action shall not relieve Lessee of liability under this Lease.

         12.4 Attorney's Fees. In the event Lessee shall assign or sublet the
Premises or request the consent of Lessor to any assignment or subletting or if
Lessee shall request the consent of Lessor for any act Lessee proposes to do
then Lessee shall pay Lessor's reasonable attorneys fees incurred in connection
therewith, such attorneys fees not to exceed $350.00 for each request.

                                       -3-
13.  Defaults; Remedies.

         13.1 Defaults. The occurrence of any one or more of the following
events shall constitute a material default and breach of this Lease by Lessee:

                  (a)  The vacating or abandonment of the Premises by Lessee.

                  (b) The failure by Lessee to make any payment of rent or any
other payment required to be made by Lessee hereunder, as and when due, where
such failure shall continue for a period of three days after written notice
thereof from Lessor to Lessee. In the event that Lessor serves Lessee with a
Notice to Pay Rent or Quit pursuant to applicable Unlawful Detainer statutes
such Notice to Pay Rent or Quit shall also constitute the notice required by
this subparagraph.

                  (c) The failure by Lessee to observe or perform any of the
covenants, conditions or provisions of this Lease to be observed or performed by
Lessee, other than described in paragraph (b) above, where such failure shall
continue for a period of 30 days after written notice thereof from Lessor to
Lessee; provided, however, that if the nature of Lessee's default is such that
more than 30 days are reasonably required for its cure, then Lessee shall not be
deemed to be in default if Lessee commenced such cure within said 30-day period
and thereafter diligently prosecutes such cure to completion.

                  (d) (i) The making by Lessee of any general arrangement or
assignment for the benefit of creditors; (ii) Lessee becomes a "debtor" as
defined in 11 U.S.C. &101 or any successor statute thereto (unless, in the case
of a petition filed against Lessee, the same is dismissed within 60 days); (iii)
the appointment of a trustee or receiver to take possession of substantially all
of Lessee's assets located at the Premises or of Lessee's interest in this
Lease, where possession is not restored to Lessee within 30 days; or (iv) the
attachment, execution or other judicial seizure of substantially all of Lessee's
assets located at the Premises or of Lessee's interest in this Lease, where such
seizure is not discharged within 30 days. Provided, however, in the event that
any provision of this paragraph 13.1(d) is contrary to any applicable law, such
provision shall be of no force or effect.

                  (e) The discovery by Lessor that any financial statement given
to Lessor by Lessee, any assignee of Lessee, any subtenant of Lessee, any
successor in interest of Lessee or any guarantor of Lessee's obligation
hereunder, and any of them, was materially false.

         13.2 Remedies. In the event of any such material default or breach by
Lessee, Lessor may at any time thereafter, with or without notice or demand and
without limiting Lessor in the exercise of any right or remedy which Lessor may
have by reason of such default or breach:

                  (a) Terminate Lessee's right to possession of the Premises by
any lawful means, in which case this Lease shall terminate and Lessee shall
immediately surrender possession of the Premises to Lessor. In such event Lessor
shall be entitled to recover from Lessee all damages incurred by Lessor by
reason of Lessee's default including, but not limited to, the cost of recovering
possession of the Premises; expenses of reletting, including necessary
renovation and alteration of the Premises, reasonable attorney's fees, and any
real estate commission actually paid; the worth at the time of award by the
court having jurisdiction thereof of the amount by which the unpaid rent for the
balance of the term after the time of such award exceeds the amount of such
rental loss for the same period that Lessee proves could be reasonably avoided;
that portion of the leasing commission paid by Lessor pursuant to Paragraph 15
applicable to the unexpired term of this Lease.

                  (b) Maintain Lessee's right to possession in which case this
Lease shall continue in effect whether or not Lessee shall have abandoned the
Premises. In such event Lessor shall be entitled to enforce all of Lessor's
rights and remedies under this Lease, including the right to recover the rent as
it becomes due hereunder.

                  (c) Pursue any other remedy now or hereafter available to
Lessor under the laws or judicial decisions of the state wherein the Premises
are located. Unpaid installments of rent and other unpaid monetary obligations
of Lessee under the terms of this Lease shall bear interest from the date due at
the maximum rate then allowable by law.

         13.3 Default by Lessor. Lessor shall not be in default unless Lessor
fails to perform obligations required of Lessor within a reasonable time, but in
no event later than thirty (30) days after written notice by Lessee to Lessor
and to the holder of any first mortgage or deed of trust covering the Premises
whose name and address shall have theretofore been furnished to Lessee in
writing, specifying wherein Lessor has failed to perform such obligation;
provided, however, that if the nature of Lessor's obligation is such that more
than thirty (30) days are required for performance then Lessor shall not be in
default if Lessor commences performance within such 30-day period and thereafter
diligently prosecutes the same to completion.

         13.4 Late Charges. Lessee hereby acknowledges that late payment by
Lessee to Lessor of rent and other sums due hereunder will cause Lessor to incur
costs not contemplated by this Lease, the exact amount of which will be
extremely difficult to ascertain. Such costs include, but are not limited to,
processing and accounting charges, and late charges which may be imposed on
Lessor by the terms of any mortgage or trust deed covering the Premises.
Accordingly, if any installment of rent or any other sum due from Lessee shall
not be received by Lessor or Lessor's designee within ten (10) days after such
amount shall be due, then, without any requirement for notice to Lessee, Lessee
shall pay to Lessor a late charge equal to 6% of such overdue amount. The
parties hereby agree that such late charge represents a fair and reasonable
estimate of the costs Lessor will incur by reason of late payment by Lessee.
Acceptance of such late charge by Lessor shall in no event constitute a waiver
of Lessee's default with respect to such overdue amount, nor prevent Lessor from
exercising any of the other rights and remedies granted hereunder. In the event
that a late charge is payable hereunder, whether or not collected, for three (3)
consecutive installments of rent, then rent shall automatically become due and
payable quarterly in advance, rather than monthly, notwithstanding paragraph 4
or any other provision of this Lease to the contrary.

         13.5 Impounds. In the event that a late charge is payable hereunder,
whether or not collected, for three (3) installments of rent or any other
monetary obligation of Lessee under the terms of this Lease, Lessee shall pay to
Lessor, if Lessor shall so request, in addition to any other payments required
under this Lease, a monthly advance installment, payable at the same time as the
monthly rent, as estimated by Lessor, for real property tax and insurance
expenses on the Premises which are payable by Lessee under the terms of this
Lease. Such fund shall be established to insure payment when due, before
delinquency, of any or all such real property taxes and insurance premiums. If
the amounts paid to Lessor by Lessee under the provisions of this paragraph are
insufficient to discharge the obligations of Lessee to pay such real property
taxes and insurance premiums as the same become due, Lessee shall pay to Lessor,
upon Lessor's demand such additional sums necessary to pay such obligations. All
moneys paid to Lessor under this paragraph may be intermingled with other moneys
of Lessor and shall not bear interest. In the event of a default in the
obligations of Lessee to perform under this Lease, then any balance remaining
from funds paid to Lessor under the provisions of this paragraph may, at the
option of Lessor, be applied to the payment of any monetary default of Lessee in
lieu of being applied to the payment of real property tax and insurance
premiums.

14. Condemnation. If the Premises or any portion thereof are taken under the
power of eminent domain, or sold under the threat of the exercise of said power
(all of which are herein called "condemnation"), this Lease shall terminate as
to the part so taken as of the date the condemning authority takes title or
possession, whichever first occurs. If more than 10% of the floor area of the
building on the Premises, or more than 25% of the land area of the Premises
which is not occupied by any building, is taken by condemnation, Lessee may, at
Lessee's option, to be exercised in writing only within ten (10) days after
Lessor shall have given Lessee written notice of such taking (or in the absence
of such notice, within ten (10) days after the condemning authority shall have
taken possession) terminate this Lease as of the date the condemning authority
takes such possession. If Lessee does not terminate this Lease in accordance
with the foregoing, this Lease shall remain in full force and effect as to the
portion of the Premises remaining, except that the rent shall be reduced in the
proportion that the floor area of the building taken bears to the total floor
area of the building situated on the Premises. No reduction of rent shall occur
if the only area taken is that which does not have a building located thereon.
Any award for the taking of all or any part of the Premises under the power of
eminent domain or any payment made under threat of the exercise of such power
shall be the property of Lessor, whether such award shall be made as
compensation for diminution in value of the leasehold or for the taking of the
fee, or as severance damages; provided, however, that Lessee shall be entitled
to any award for loss of or damage to Lessee's trade fixtures and removable
personal property. In the event that this Lease is not terminated by reason of
such condemnation, Lessor shall to the extent of severance damages received by
Lessor in connection with such condemnation, repair any damage to the Premises
caused by such condemnation except to the extent that Lessee has been reimbursed
therefor by the condemning authority. Lessee shall pay any amount in excess of
such severance damages required to complete such repair.

15.  (Deleted)

16.  Estoppel Certificate.

         (a) Lessee shall at any time upon not less than ten (10) days' prior
written notice from Lessor execute, acknowledge and deliver to Lessor a
statement in writing (i) certifying that this Lease is unmodified and in full
force and effect (or, if modified, stating the nature of such modification and
certifying that this Lease, as so modified, is in full force and effect) and the
date to which the rent and other charges are paid in advance, if any, and (ii)
acknowledging that there are not, to Lessee's knowledge, any uncured defaults on
the part of Lessor hereunder, or specifying such defaults if any are claimed.
Any such statement may be conclusively relied upon by any prospective purchaser
or encumbrancer of the Premises.

         (b) At Lessor's option, Lessee's failure to deliver such statement
within such time shall be a material breach of this Lease or shall be conclusive
upon Lessee (i) that this Lease is in full force and effect, without
modification except as may be represented by Lessor, (ii) that there are no
uncured defaults in Lessor's performance, and (iii) that not more than one
month's rent has been paid in advance or such failure may be considered by
Lessor as a default by Lessee under this Lease.

         (c) If Lessor desires to finance, refinance, or sell the Premises, or
any part thereof, Lessee agrees to deliver to any lender or purchaser designated
by Lessor such published financial statements of Lessee as may be reasonably
required by such lender or purchaser. Such statements shall include the past
three years' financial statements of Lessee. All such financial statements shall
be received by Lessor and such lender or purchaser in confidence and shall be
used only for the purposes herein set forth.

                                       -4-
17. (Deleted)

18. Severability. The invalidity of any provision of this Lease as determined by
a court of competent jurisdiction, shall in no way affect the validity of any
other provision hereof.

19. Interest on Past-due Obligations. Except as expressly herein provided, any
amount due to Lessor not paid when due shall bear interest at the maximum rate
then allowable by law from the date due. Payment of such interest shall not
excuse or cure any default by Lessee under this Lease, provided, however, that
interest shall not be payable on late charges incurred by Lessee nor on any
amounts upon which late charges are paid by Lessee.

20. Time of Essence. Time is of the essence.

21. Additional Rent. Any monetary obligations of Lessee to Lessor under the
terms of this Lease shall be deemed to be rent.

22. Incorporation of Prior Agreements; Amendments. This Lease contains all
agreements of the parties with respect to any matter mentioned herein. No prior
agreement or understanding pertaining to any such matter shall be effective.
This Lease may be modified in writing only, signed by the parties in interest at
the time of the modification. Except as otherwise stated in this Lease, Lessee
hereby acknowledges that neither the real estate broker listed in Paragraph 15
hereof nor any cooperating broker on this transaction nor the Lessor or any
employees or agents of any of said persons has made any oral or written
warranties or representations to Lessee relative to the condition or use by
Lessee of said Premises and Lessee acknowledges that Lease assumes all
responsibility regarding the Occupational Safety Health Act, the legal use and
adaptability of the Premises and the compliance thereof with all applicable laws
and regulations in effect during the term of this Lease except as otherwise
specifically stated in this Lease.

23. Notices. Any notice required or permitted to be given hereunder shall be in
writing and may be given by personal delivery or by certified mail, and if given
personally or by mail, shall be deemed sufficiently given if addressed to Lessee
or to Lessor at the address noted below the signature of the respective parties,
as the case may be. Either party may by notice to the other specify a different
address for notice purposes except that upon Lessee's taking possession of the
Premises, the Premises shall constitute Lessee's address for notice purposes. A
copy of all notices required or permitted to be given to Lessor hereunder shall
be concurrently transmitted to such party or parties at such addresses as Lessor
may from time to time hereafter designate by notice to Lessee.

24. Waivers. No waiver by Lessor or any provision hereof shall be deemed a
waiver of any other provision hereof or of any subsequent breach by Lessee of
the same or any other provision. Lessor's consent to, or approval of, any act
shall not be deemed to render unnecessary the obtaining of Lessor's consent to
or approval of any subsequent act by Lessee. The acceptance of rent hereunder by
Lessor shall not be a waiver of any preceding breach by Lessee of any provision
hereof, other than the failure of Lessee to pay the particular rent so accepted,
regardless of Lessor's knowledge of such preceding breach at the time of
acceptance of such rent.

25. Recording. Either Lessor or Lessee shall, upon request of the other,
execute, acknowledge and deliver to the other a "short form" memorandum of this
Lease for recording purposes.

26. Holding Over. If Lessee, with Lessor's consent, remains in possession of the
Premises or any part thereof after the expiration of the term hereof, such
occupancy shall be a tenancy from month to month upon all the provisions of this
Lease pertaining to the obligations of Lessee, but all options and rights of
first refusal, if any, granted under the terms of this Lease shall be deemed
terminated and be of no further effect during said month to month tenancy.

27. Cumulative Remedies. No remedy or election hereunder shall be deemed
exclusive but shall, wherever possible, be cumulative with all other remedies at
law or in equity.

28. Covenants and Conditions. Each provision of this Lease performable by Lessee
shall be deemed both a covenant and a condition.

29. Binding Effect; Choice of Law. Subject to any provisions hereof restricting
assignment or subletting by Lessee and subject to the provisions of Paragraph
17, this Lease shall bind the parties, their personal representatives,
successors and assigns. This Lease shall be governed by the laws of the State
wherein the Premises are located.

30.  Subordination.

         (a) This Lease, at Lessor's option, shall be subordinate to any ground
lease, mortgage, deed of trust, or any other hypothecation or security now or
hereafter placed upon the real property of which the Premises are a part and to
any and all advances made on the security thereof and to all renewals,
modifications, consolidations, replacements and extensions thereof.
Notwithstanding such subordination; Lessee's right to quiet possession of the
Premises shall not be disturbed if Lessee is not in default and so long as
Lessee shall pay the rent and observe and perform all of the provisions of this
Lease, unless this Lease is otherwise terminated pursuant to its terms. If any
mortgage, trustee or ground lessor shall elect to have this Lease prior to the
lien of its mortgage, deed of trust or ground lease, and shall give written
notice thereof to Lessee, this Lease shall be deemed prior to such mortgage,
deed of trust, or ground lease, whether this Lease is dated prior or subsequent
to the date of said mortgage, deed of trust or ground lease or the date of
recording thereof.

         (b) Lessee agrees to execute any documents required to effectuate an
attornment, a subordination or to make this Lease prior to the lien of any
mortgage, deed of trust or ground lease, as the case may be. Lessee's failure to
execute such documents within 10 days after written demand shall constitute a
material default by Lessee hereunder, or, at Lessor's option, Lessor shall
execute such documents on behalf of Lessee as Lessee's attorney-in-fact. Lessee
does hereby make, constitute and irrevocably appoint Lessor as Lessee's
attorney-in-fact and in Lessee's name, place and stead, to execute such
documents in accordance with this paragraph 30(b).

31. Attorney's Fees. If either party or the broker named herein brings an action
to enforce the terms hereof or declare rights hereunder, the prevailing party in
any such action, on trial or appeal, shall be entitled to his reasonable
attorney's fees to be paid by the losing party as fixed by the court. The
provisions of this paragraph shall inure to the benefit of the broker named
herein who seeks to enforce a right hereunder.

32. Lessor's Access. Lessor and Lessor's agents shall have the right to enter
the Premises at reasonable times for the purpose of inspecting the same, showing
the same to prospective purchasers, lenders, or leases, and making such
alterations, repairs, improvements or additions to the Premises or to the
building of which they are a part as Lessor may deem necessary or desirable.
Lessor may at any time place on or about the Premises any ordinary "For Sale"
signs and Lessor may at any time during the last 120 days of the term hereof
place on or about the Premises any ordinary "For Lease" signs, all without
rebate of rent or liability to Lessee.

33. Auctions. Lessee shall not conduct, nor permit to be conducted, either
voluntarily or involuntarily, any auction upon the Premises without first having
obtained Lessor's prior written consent. Notwithstanding anything to the
contrary in this Lease, Lessor shall not be obligated to exercise any standard
of reasonableness in determining whether to grant such consent.

34. Signs. Lessee shall not place any sign upon the Premises without Lessor's
prior written consent except that Lessee shall have the right, without the prior
permission of Lessor to place ordinary and usual for rent or sublet signs
thereon.

35. Merger. The voluntary or other surrender of this Lease by Lessee, or a
mutual cancellation thereof, or a termination by Lessor, shall not work a
merger, and shall, at the option of Lessor, terminate all or any existing
subtenancies or may, at the option of Lessor, operate at an assignment to Lessor
of any or all of such subtenancies.

36. Consents. Except for paragraph 33 hereof, wherever in this Lease the consent
of one party is required to an act of the other party such consent shall not be
unreasonably withheld.

37. Guarantor. In the event that there is a guarantor of this Lease, said
guarantor shall have the same obligations as Lessee under this Lease.

38. Quiet Possession. Upon Lessee paying the rent for the Premises and observing
and performing all of the covenants, conditions and provisions on Lessee's part
to be observed and performed hereunder, Lessee shall have quiet possession of
the Premises for the entire term hereof subject to all of the provisions of this
Lease. The individuals executing this Lease on behalf of Lessor represent and
warrant to Lessee that they are fully authorized and legally capable of
executing this Lease on behalf of Lessor represent and warrant to Lessee that
they are fully authorized and legally capable of executing this Lease on behalf
of Lessor and that such execution is binding upon all parties holding an
ownership interest in the Premises.

39.  Options.

         39.1 Definition. As used in this paragraph the word "Options" has the
following meaning: (1) the right or option to extend the term of this Lease or
to renew this Lease or to extend or renew any lease that Lessee has on the other
property of Lessor; (2) the option or right of first refusal to lease the
Premises or the right of first offer to lease the Premises or the right of first
refusal to lease other property of Lessor or the right of first offer to lease
other property of Lessor; (3) the right or option to purchase the Premises, or
the right of first refusal to purchase the Premises, or the right of first offer
to purchase the Premises or the right or option to purchase other property of
Lessor, or the right of first refusal to purchase other property of Lessor or
the right of first offer to purchase other property of Lessor.

         39.2 Options Personal. Each Option granted to Lessee in this Lease are
personal to Lessee and may not be exercised or be assigned, voluntarily or
involuntarily, by or to any person or entity other than Lessee, provided,
however, the Option may be exercised by or assigned to any Lessee Affiliate as
defined in paragraph 12.2 of this Lease. The Options herein granted to Lessee
are not assignable separate and apart from this Lease.

         39.3 Multiple Options. In the event that Lessee has any multiple
options to extend or renew this Lease a later option cannot be exercised unless
the prior option to extend or renew this Lease has been so exercised.

                                       -5-
         39.4  Effect of Default on Options.

                  (a) Lessee shall have no right to exercise an Option,
notwithstanding any provision in the grant of Option to the contrary, (i) during
the time commencing from the date Lessor gives to Lessee a notice of default
pursuant to paragraph 13.1(b) or 13.1(c) and continuing until the default
alleged in said notice of default is cured, or (ii) during the period of time
commencing on the day after a monetary obligation to Lessor is due from Lessee
and unpaid (without any necessity for notice thereof to Lessee) continuing until
the obligation is paid, or (iii) at any time after an event of default described
in paragraphs 13.1(a), 13.1(d), or 13.1(e) (without any necessity of Lessor to
give notice of such default to Lessee), or (iv) in the event that Lessor has
given to Lessee three or more notices of default under paragraph 13.1(b), where
a late charge has become payable under paragraph 13.4 for each of such defaults,
or paragraph 13.1(c), whether or not the defaults are cured, during the 12 month
period prior to the time that Lessee intends to exercise the subject Option.

                  (b) The period of time within which an Option may be exercised
shall not be extended or enlarged by reason of Lessee's inability to exercise an
Option because of the provisions of paragraph 39.4(a).

                  (c) All rights of Lessee under the provisions of an Option
shall terminate and be of no further force or effect, notwithstanding Lessee's
due and timely exercise of the Option, if, after, such exercise and during the
term of this Lease, (i) Lessee fails to pay to Lessor a monetary obligation of
Lessee for a period of 30 days after such obligation becomes due (without any
necessity of Lessor to give notice thereof to Lessee), or (ii) Lessee fails to
commence to cure a default specified in paragraph 13.1(c) within 30 days after
the date that Lessor gives notice to Lessee of such default and/or Lessee fails
thereafter to diligently prosecute said cure to completion, or (iii) Lessee
commits a default described in paragraph 13.1(a), 13,1(d) or 13.1 (e) (without
any necessity of Lessor to give notice of such default to Lessee), or (iv)
Lessor gives to Lessee three or more notices of default under paragraph 13.1(b),
where a late charge becomes payable under paragraph 13.4 for each such default,
or paragraph 13.1(c), whether or not the defaults are cured.

40. Multiple Tenant Building. In the event that the Premises are part of a
larger building or group of buildings then Lessee agrees that it will abide by,
keep and observe all reasonable rules and regulations which Lessor may make from
time to time for the management, safety, care, and cleanliness of the building
and grounds, the parking of vehicles and the preservation of good order therein
as well as for the convenience of other occupants and tenants of the building.
The violations of any such rules and regulations shall be deemed a material
breach of this Lease by Lessee.

41. Security Measures. Lessee hereby acknowledges that the rental payable to
Lessor hereunder does not include the cost of guard service or other security
measures, and that Lessor shall have no obligation whatsoever to provide same.
Lessee assumes all responsibility for the protection of Lessee, its agents and
invites from acts of third parties.

42. Easements. Lessor reserves to itself the right, from time to time, to grant
such easements, rights and dedications that Lessor deems necessary or desirable,
and to cause the recordation of Parcel Maps and restrictions, so long as such
easements, rights, dedications, Maps and restrictions do not unreasonably
interfere with the use of the Premises by Lessee. Lessee shall sign any of the
aforementioned documents upon request of Lessor and failure to do so shall
constitute a material breach of this Lease.

43. Performance Under Protest. If at any time a dispute shall arise as to any
amount or sum of money to be paid by one party to the other under the provisions
hereof, the party against whom the obligation to pay the money is asserted shall
have the right to make payment "under protest" and such payment shall not be
regarded as voluntary payment, and there shall survive the right on the part of
said party of institute suit for recovery of each sum. If it shall be adjudged
that there was no legal obligation on part of said party to pay such sum or any
part thereof, said party shall be entitled to recover such sum or so much
thereof as it was not legally required to pay under the provisions of this
Lease.

44. Authority. If Lessee is a corporation, trust, or general or limited
partnership, each individual executing this Lease on behalf of such entity
represents and warrants that he or she is duly authorized to execute and deliver
this Lease on behalf of said entity. If Lessee is a corporation, trust or
partnership, Lessee shall, within thirty (30) days after execution of this
Lease, deliver to Lessor evidence of such authority satisfactory to Lessor.

45. Conflict. Any conflict between the printed provisions of this Lease and the
typewritten or handwritten provisions shall be controlled by the typewritten or
handwritten provisions.

46.  Insuring Party.  The insuring party under this lease shall be the Lessee

47. Addendum. Attached hereto is an addendum or addenda containing paragraphs
47.1 through 47.4 which constitutes a part of this Lease.

LESSOR AND LESSEE HAVE CAREFULLY READ AND REVIEWED THIS LEASE AND EACH TERM AND
PROVISION CONTAINED HEREIN AND, BY EXECUTION OF THIS LEASE, SHOW THEIR INFORMED
AND VOLUNTARY CONSENT THERETO. THE PARTIES HEREBY AGREE THAT, AT THE TIME THIS
LEASE IS EXECUTED, THE TERMS OF THIS LEASE ARE COMMERCIALLY REASONABLE AND
EFFECTUATE THE INTENT AND PURPOSE OF LESSOR AND LESSEE WITH RESPECT TO THE
PREMISES.

IF THIS LEASE HAS BEEN FILLED IN IT HAS BEEN PREPARED FOR SUBMISSION TO YOUR
ATTORNEY FOR HIS APPROVAL. NO REPRESENTATION OR RECOMMENDATION IS MADE BY THE
AMERICAN INDUSTRIAL REAL ESTATE ASSOCIATION OR BY THE REAL ESTATE BROKER OR ITS
AGENTS OR EMPLOYEES AS TO THE LEGAL SUFFICIENCY, LEGAL EFFECT, OR TAX
CONSEQUENCES OF THIS LEASE OR THE TRANSACTION RELATING THERETO; THE PARTIES
SHALL RELY SOLELY UPON THE ADVICE OF THEIR OWN LEGAL COUNSEL AS TO THE LEGAL AND
TAX CONSEQUENCES OF THIS LEASE.

The parties hereto have executed this Lease at the place on the dates specified
immediately adjacent to their respective signatures.

BOWMAN MERRITT AND VIRGINIA MERRITT TRUST

By /s/Virginia Merritt
Virginia Merritt, Trustee

By /s/Kim Merritt Campot
Kim Merritt Campot
"LESSOR"

XOMA CORPORATION

By /s/Clarence L. Dellio
Clarence L. Dellio
Senior Vice President, Operations
"LESSEE"
                                ADDENDUM TO LEASE

         ADDENDUM to lease dated October 12, 1992 between XOMA Corporation,
("XOMA"), Lessee, and Virginia Merritt as Trustee of the Bowman and Virginia
Merritt as Trustee of the Bowman and Virginia Merritt Trust ("Merritt"), Lessor,
for approximately 18,000 sq. ft. at 1545 17th Street, Santa Monica, California
90404.

Paragraph 47.1. The minimum monthly rent provided for in Paragraph 4 shall be
subject to adjustment at the 1994 anniversary of the commencement date of the
lease and every other year thereafter ("the adjustment date") as follows:

         The base for computing the adjustment is the Los Angeles-Long
Beach-Anaheim All Urban Workers, published by United States Department of Labor,
Bureau of Labor Statistics ("Index"), which is in effect on the date of the
commencement of the term ("Beginning Index"). The index published most
immediately preceding the adjustment date in question ("Extension Index") is to
be used in determining the amount of the adjustment. If the Extension Index has
increased over the Beginning Index, the minimum monthly rent for the following
two years (until the next rent adjustment) shall be set by multiplying the
minimum monthly rent set forth in paragraph 4 by a fraction, the numerator of
which is the Extension Index and the denominator of which is the Beginning
Index. In no case shall the minimum monthly rent set forth in paragraph 4 by a
fraction, the numerator of which is the Extension Index and the denominator of
which is the Beginning Index. In no case shall the minimum monthly rent be less
than the monthly rent in effect immediately prior to the adjustment date then
occurring. On adjustment of the minimum monthly rent as provided in this lease,
lessee shall immediately commence to pay the new monthly rent retroactive to the
adjustment date and the parties shall immediately execute an amendment to this
lease stating the new minimum monthly rent.

         If the Index has changed so that the base year differs from that in
effect when the term commences, the Index shall be converted in accordance with
the conversion factor published by the United States Department of Labor, Bureau
of Labor Statistics. If the Index is discontinued or revised during the term,
such other government index or computation with which it is replaced shall be
used in order to obtain substantially the same result as would be obtained if
the Index had not been discontinued or revised.

Paragraph 47.2. Lessee shall receive a credit of $25,144.00 for deposit
previously made on account of the previous lease dated August 1, 1990,
therefore, Lessee need make no additional deposit.

Paragraph 47.3. Lessee to pay premiums for fire and multi-peril insurance
chargeable against the building and the improvements during the term hereof, as
additional rent.

Paragraph 47.4. Within twelve (12) months of the date of this lease, Lessee
shall complete the construction of all Lessee improvements as appropriate, such
improvements currently having an estimated cost of $1 Million. In consideration
for said improvements, Lessee shall

receive a credit of $36,000.00 against the first six months of rent, which
$36,000.00 shall be applied $6,000.00 per month commencing with the first rental
payment and continuing for the following five months.

                                    XOMA Corporation

                                    By: /s/Clarence L. Dellio
                                    Sr. Vice President, Operations
                                    "Lessee"

                                    Bowman Merritt and Virginia
                                    Merritt Trust

                                    By:/s/Virginia Merritt
                                    Virgina Merritt, Trustee
                                    "Lessor"

                                    /s/Kim Merritt Campot
                                    Kim Merritt Campot