PURCHASE AND SALE AGREEMENT

                                JULY __, 1997

                                BY AND BETWEEN

                    ALEXANDRIA REAL ESTATE EQUITIES, INC.,

                                    BUYER

                                     AND

                 QUINCE ORCHARD ROAD LIMITED PARTNERSHIP II,

                                    SELLER








                         PURCHASE AND SALE AGREEMENT


         THIS PURCHASE AND SALE AGREEMENT (this "AGREEMENT"), is made and 
entered into as of July ___, 1997, by and between ALEXANDRIA REAL ESTATE 
EQUITIES, INC., a Maryland corporation or its assignee or nominee 
(collectively, "BUYER"), and QUINCE ORCHARD ROAD LIMITED PARTNERSHIP II, a 
Maryland limited partnership ("SELLER"), for the purposes of setting forth 
the agreement of the parties with respect to the transactions contemplated by 
this Agreement.

                                   RECITALS

         Upon and subject to the terms and conditions set forth in this 
Agreement, Seller desires to sell and Buyer desires to purchase all of the 
following (collectively, the "PROPERTY"): (i) the fee interest in that 
certain real property located in the City of Gaithersburg, County of 
Montgomery, State of Maryland, as legally described on EXHIBIT "A" attached 
hereto, together with all rights, privileges and easements appurtenant 
thereto or used in connection therewith, including, without limitation, all 
minerals, oil, gas and other hydrocarbon substances thereon (but only to the 
extent now or hereafter owned by Seller), all development rights, air rights, 
water, water rights and water stock relating thereto, and any easements, 
rights-of-way, or other rights appurtenant thereto or used in connection 
therewith (collectively, the "LAND"); (ii) all buildings, improvements, 
structures and fixtures included or located on or in the Land (collectively, 
the "IMPROVEMENTS"), including, without limitation that certain building 
commonly known as 708 Quince Orchard Road (the "BUILDING"), and all other 
buildings and structures presently located on or in the Land, and all 
apparatus, equipment and appliances now or hereafter owned by Seller and used 
in connection with the operation or occupancy of the Land and the 
Improvements, such as heating and air conditioning or mechanical systems and 
facilities used to provide any utility services, refrigeration, ventilation, 
waste disposal or other services now or hereafter located on or in the Land 
or the Improvements; (iii) all tangible personal property (collectively, the 
"PERSONAL PROPERTY"), if any, now or hereafter owned by Seller and located on 
or about the Land or Improvements or attached thereto or used in connection 
with the use, operation, maintenance or repair thereof; and (iv) all 
intangible property (collectively, the "INTANGIBLE PROPERTY") now or 
hereafter owned by Seller and used in connection with the Land, the 
Improvements or the Personal Property, or any business or businesses 
conducted thereon or with the use thereof, including, without limitation, the 
"Service Contracts" (as hereinafter defined), building and trademarks and 
trade names, transferable business licenses, permits, applications, 
authorizations and other entitlements, transferable guarantees and warranties 
covering the Land and/or Improvements, all contract rights, books, records, 
reports, test results, environmental assessments, and other similar documents 
and materials relating to the use or operation, maintenance or repair of the 
Property or the construction or fabrication thereof, and all transferable 
utility contracts.

                                       2



                                   AGREEMENT

         In consideration of the mutual covenants contained in this Agreement 
and for other good and valuable consideration, the receipt and sufficiency of 
which are hereby acknowledged, Buyer and Seller hereby agree as follows:

1.  AGREEMENT TO PURCHASE AND SELL.

         Subject to all of the terms and conditions of this Agreement, Seller 
agrees to sell, transfer and convey to Buyer, and Buyer agrees to acquire and 
purchase from Seller, the Property, upon the terms and conditions set forth 
herein.

2.  PURCHASE PRICE.

         The purchase price for the Property (the "PURCHASE PRICE") shall be 
the sum of THREE MILLION NINE HUNDRED FORTY-FIVE THOUSAND (United States) 
Dollars (U.S. $3,945,000).  The Purchase Price shall be payable as follows:

     2.1  DEPOSIT.  Upon the execution and delivery of this Agreement by the 
parties hereto, Buyer shall deposit with Chicago Title Insurance Company, San 
Diego Office, as "Escrow Agent," the sum of THREE HUNDRED THOUSAND (United 
States) Dollars (U.S. $300,000) (the "DEPOSIT") by wire transfer or certified 
or bank check payable to the order of Escrow Agent.  The Escrow Agent shall 
invest the Deposit in insured money market accounts, certificates of deposit, 
United States Treasury Bills or such other instruments as Buyer may instruct 
from time to time.  In the event of the consummation of the purchase and sale 
of the Property as contemplated hereunder, the Deposit together with all 
interest accrued thereon shall be paid to Seller at the Closing (as defined 
in Section 6 below) and credited against the Purchase Price.  In the event 
the sale of the Property is not consummated because of the termination of 
this Agreement by Buyer in accordance with any right to so terminate provided 
herein, or the failure of any condition or any other reason except for a 
default under this Agreement solely on the part of the Buyer, the Deposit 
together with all interest accrued thereon shall be returned to Buyer.  

     2.2  BALANCE.  On the Closing Date (as defined in Section 6 below), 
Buyer shall pay to Seller the balance of the Purchase Price over and above 
the Deposit paid by Buyer under SECTION 2.1 above, by wire transfer of 
federal funds at the Closing, net of all prorations and adjustments as 
provided herein.

3.  [Intentionally Omitted]


                                       3



4.  ACTIONS PENDING CLOSING.

     4.1  DUE DILIGENCE PERIOD.  

          4.1.1  DUE DILIGENCE.  

               4.1.1.1  PROPERTY DOCUMENTS.  Not later than five (5) days 
after the date hereof, Seller shall deliver to Buyer copies of all contracts, 
documents, leases, books, records and other materials, if any, relating to 
the Property, including, without limitation, as-built plans and 
specifications, operating statements, rent rolls, leases, engineering tests, 
soil tests, a Phase One environmental/asbestos audit of the Property, a Phase 
Two environmental audit of the Property, service contracts, structural and 
mechanical reports, maps, plans, agreements, governmental permits and 
approvals, appraisals, title policies, surveys, construction warranties, land 
studies and such other information as may be reasonably required by Buyer to 
enable Buyer to complete property questionnaires to determine whether the 
acquisition of the Property could result in Buyer losing its status as a real 
estate investment trust, as defined in Section 856 of the Internal Revenue 
Code of 1986, as amended (collectively, the "PROPERTY DOCUMENTS"), to the 
extent that the Property Documents are in Seller's direct possession or 
control, or in the direct control or possession of its management agents all 
at Seller's sole cost and expense.  

               4.1.1.2  DILIGENCE TESTS.  At all reasonable times from the 
date hereof until the Closing or earlier termination of this Agreement, 
Buyer, its agents and representatives shall be entitled at Buyer's sole cost 
and expense to (i) enter onto the Property during normal business hours and 
upon reasonable advance notice to Seller, to perform any inspections, 
investigations, studies and tests of the Property, including, without 
limitation, physical, structural, mechanical, architectural, engineering, 
soils, geotechnical and environmental/asbestos tests that Buyer deems 
reasonable; (ii) cause an environmental assessment of the Property to be 
performed, upon reasonable notice to Seller; and (iii) review all Property 
Documents and examine and copy any and all books and records maintained by 
Seller or its agents relating to the Property (including, without limitation, 
all documents relating to utilities, zoning, and the access, subdivision and 
appraisal of the Property).  Buyer shall use its reasonable efforts to 
conduct its investigations upon or at the Property in such a manner as to 
minimize any interference to the tenants and occupants of the Property.

               4.1.1.3  [INTENTIONALLY OMITTED]

               4.1.1.4  INSURANCE.  Buyer agrees that during the Due 
Diligence Period it shall carry, or cause its agent to carry, worker's 
compensation and general liability insurance in the amount of $1,000,000 per 
occurrence, which insurance shall name Seller as an additional insured; upon 
request, Buyer shall provide Seller with a certificate of such insurance 
prior to commencing Buyer's physical inspections of the Property.


                                       4



               4.1.1.5  INDEMNITY AND REPAIR.  Buyer agrees to indemnify and 
hold harmless Seller from any loss, cost, damage or expense (including 
reasonable attorneys' fees) arising from any actual damage to the Property or 
any injury to persons caused by any act of Buyer or its agents or consultants 
as a result of the inspections, investigations or tests performed pursuant to 
Section 4.1.1.2 above, which indemnity shall survive the termination of this 
Agreement or the Closing and delivery of the Deed (as hereinafter defined) 
for a period of two (2) years; provided, however, that Buyer's indemnity 
hereunder shall not include any losses, cost, damage or expenses resulting 
from (x) the acts of Seller, its agents or representatives, or (y) the 
discovery of any pre-existing condition of the Property.  In addition, if 
this Agreement is terminated, Buyer shall promptly repair any material damage 
to the Property caused by its entry thereon and shall restore the Property 
substantially to the condition in which it existed prior to such entry; 
provided, however, that Buyer shall have no obligation to repair any damage 
caused by Seller's negligence or willful misconduct or to remediate, contain, 
abate or control any "Material of Environmental Concern" (as hereinafter 
defined) or any hazardous defect that existed at the Property prior to 
Buyer's entry thereon.

          4.1.2  TERMINATION RIGHT.  Buyer shall have the right at any time 
during the period (the "DUE DILIGENCE PERIOD") beginning upon the date of 
this Agreement and ending thirty (30) calendar days following the date of 
mutual execution of this Agreement by both Buyer and Seller (the "DUE 
DILIGENCE TERMINATION DATE") to terminate this Agreement if, during the 
course of Buyer's due diligence investigation of the Property, Buyer 
determines in its sole and absolute discretion that the Property is not 
acceptable to Buyer.  Buyer may exercise such termination right by delivering 
written notice of termination to Seller on or before the Due Diligence 
Termination Date.  Upon such termination, (i) Escrow Agent shall return the 
Deposit, together with all interest and earnings accrued thereon, to Buyer, 
(ii) Buyer shall pay the cancellation charges of Escrow Agent, and (iii) this 
Agreement shall automatically terminate and be of no further force or effect 
and neither party shall have any further rights or obligations hereunder, 
other than pursuant to any provision hereof which expressly survives the 
termination of this Agreement.  If Buyer does not exercise such termination 
in writing prior to the Due Diligence Termination Date, then Buyer's right to 
terminate this Agreement pursuant to this Section 4.1.2 shall automatically 
lapse.

     4.2  TITLE.

          4.2.1  ITEMS OBTAINED BY BUYER.  Seller hereby authorizes Buyer, on 
Buyer's own behalf and at Buyer's sole cost and expense, to obtain (i) a 
commitment (the "PTR") for title insurance issued by Chicago Title Insurance 
Company (in such capacity, "TITLE COMPANY") showing the current status of 
title to the Land and Improvements together with legible copies of all 
documents and items referenced as exceptions therein, (ii) an as-built 
American Land Title Association survey of the Land and Improvements (the 
"SURVEY") prepared by a surveyor registered in the State of Maryland (the 
"SURVEYOR"), showing all improvements and structures, all roads, access to 
and from the Land, and encroachments and encumbrances affecting the same, in 
form reasonably satisfactory to Buyer and Title Company,

                                       5



prepared and certified to Buyer, Title Company, and such other persons or 
entities as Buyer may, in its discretion, request, and (iii) a UCC Search 
with regard to the Personal Property (the "UCC SEARCH").

          4.2.2  BUYER'S REVIEW OF TITLE.  Buyer shall have until the Due 
Diligence Termination Date to notify Seller in writing of any objection which 
Buyer may have to any exception reported in the PTR or matter shown on the 
Survey or the UCC Search. Exceptions reported in the PTR and matters shown on 
the Survey or the UCC Search (or any updates thereof) not objected to by 
Buyer as provided above shall be deemed to be "PERMITTED EXCEPTIONS."  Seller 
shall have until the fifth (5th) calendar day after the date on which Buyer 
delivers such objections, if any, to Seller, to notify Buyer in writing as to 
(a) whether Seller will not remove or cure the objections, (b) whether Seller 
will remove from title to the Property any exceptions and matters so objected 
to by the Buyer, or (c) whether Seller will obtain for Buyer title insurance 
insuring over such exceptions or matters, such insurance to be in form and 
substance satisfactory to Buyer.  If Seller informs Buyer that Seller is 
unwilling or unable to remove or satisfactorily insure over any exceptions or 
matters objected to by Buyer and Buyer is unwilling to take title subject 
thereto, then on or before the fifth (5th) calendar day after the date on 
which Seller delivers such notice, Buyer, by written notice to Seller, may 
either (a) waive such exceptions or matters, whereupon such exceptions or 
matters shall be deemed Permitted Exceptions or (b) terminate this Agreement 
(in which case Escrow Agent shall return to Buyer the Deposit together with 
any interest thereon, Buyer shall pay the cancellation charges of Escrow 
Agent, and neither party shall thereafter have any rights or obligation to 
the other hereunder).  Seller shall in any event be required to discharge and 
remove any and all liens affecting the Property which secure an obligation to 
pay money (other than installments of real estate taxes not delinquent as of 
the Closing) and, even though Buyer does not expressly disapprove such liens, 
such liens shall not be Permitted Exceptions and, in the event Seller fails 
to discharge such liens at or prior to Closing (it being understood that the 
proceeds of Closing may be used to discharge such liens), then Buyer may 
discharge such liens at Closing and deduct from the cash portion of the 
purchase price the amounts paid by Buyer to the holder of the liens.  In the 
event that Seller informs Buyer that Seller will either remove or 
satisfactorily insure over such exceptions or matters and Seller fails to 
either remove or satisfactorily insure over such exceptions or matters by the 
Closing, then Seller shall be in default of this Agreement and accordingly, 
Escrow Agent shall return the Deposit to Buyer together with all interest 
earned thereon and Buyer shall be entitled to pursue any remedy available to 
it under Section 11.2 hereof.

          4.2.3  CONDITION OF TITLE AT CLOSING.  Upon the Closing, Seller 
shall sell, transfer and convey to Buyer fee simple title to the Land and 
Improvements thereon by a duly executed and acknowledged special warranty 
deed in the form of EXHIBIT "C" attached hereto (the "DEED"), subject only to 
the Permitted Exceptions.  Prior to Closing, Seller shall not take any action 
or commit or suffer any acts which would give rise to a variance from the 
current legal description of the Land, or cause the creation of any exception 
or encumbrance against or respecting the Land without the prior written 
consent of Buyer in its sole discretion.  Nothing

                                       6



in this SECTION 4.2.3 shall preclude Buyer from disapproving title matters in 
accordance with the provisions of SECTION 4.2.2 above.

5.  CONDITIONS PRECEDENT TO CLOSING.

     5.1  BUYER'S CONDITIONS.  The obligation of Buyer to render performance 
under this Agreement is subject to the following conditions precedent (and 
conditions concurrent, with respect to deliveries to be made by the parties 
at Closing) (the "CONDITIONS PRECEDENT"), which conditions may be waived, or 
the time for satisfaction thereof extended (but not beyond the scheduled 
Closing Date), by Buyer only in a writing executed by Buyer (provided, 
however, that any such waiver shall not affect Buyer's ability to pursue any 
remedy it may have with respect to any breach hereunder by Seller):

          5.1.1  TITLE.  Title Company shall be prepared and irrevocably 
committed to issue to Buyer an American Land Title Association extended 
coverage owner's policy of title insurance in favor of Buyer in an amount 
equal to the Purchase Price showing fee title to the Property vested in 
Buyer, with those endorsements requested by Buyer which Title Company has 
agreed to issue as part of the PTR prior to the end of the Due Diligence 
Period, subject only to the Permitted Exceptions (collectively, the "OWNER'S 
TITLE POLICY"). 

          5.1.2  SELLER'S DUE PERFORMANCE.  All of the representations and 
warranties of Seller set forth in SECTION 7 below shall be true and correct 
as of the Closing Date in all material respects, and Seller, on or prior to 
the Closing Date, shall have complied with and/or performed all of the 
obligations, covenants and agreements required on the part of Seller to be 
complied with or performed pursuant to the terms of this Agreement.  On the 
Closing Date, Seller shall deliver a certificate, in the form of EXHIBIT "D" 
attached hereto, to Buyer certifying that all of the representations and 
warranties of Seller as set forth in SECTION 7 below are true and correct in 
all material respects as of such date.

          5.1.3  PHYSICAL CONDITION OF PROPERTY.  Subject to the provisions 
of SECTION 10 below, the physical condition of the Property shall be 
substantially the same on the Closing Date as on the date of the execution of 
this Agreement, except for (i) reasonable wear and tear, and (ii) any damages 
due to any act of Buyer or Buyer's Representatives.

          5.1.4  BANKRUPTCY.  No action or proceeding shall have been 
commenced by or against Seller under the federal bankruptcy code or any state 
law for the relief of debtors or for the enforcement of the rights of 
creditors and no attachment, execution or levy shall have attached to or been 
issued with respect to the Property or any portion thereof.

          5.1.5  BILL OF SALE.  On or before the Close of Escrow, Seller 
shall deliver to Buyer a bill of sale and assignment (the "BILL OF SALE AND 
ASSIGNMENT"), by which Seller shall transfer to Buyer all the Personal 
Property and the Intangible Property, including, 

                                       7



without limitation, the Property Documents, free of all liens and 
encumbrances, in the form of EXHIBIT "F" attached hereto.

          5.1.6  NONFOREIGN AFFIDAVIT.  On or before the Close of Escrow, 
Seller shall deliver to Buyer the Nonforeign Affidavit (the "NONFOREIGN 
AFFIDAVIT") in the form of EXHIBIT "H" attached hereto, executed by Seller.

          5.1.7  NO MORATORIA. After the Due Diligence Termination Date, no 
moratorium, statute, regulation, ordinance, or federal, state, county or 
local legislation, or order, judgment, ruling or decree of any governmental 
agency or of any court shall have been enacted, adopted, issued, entered or 
pending which would adversely affect Buyer's intended use of the Property; 
PROVIDED, HOWEVER, that this condition shall not extend to any such 
moratorium, statute, regulation, ordinance, or legislation, order, judgment, 
ruling or decree that was enacted, adopted, issued, entered or pending on or 
before the Due Diligence Termination Date.   

     5.2  FAILURE OF CONDITIONS PRECEDENT.  Subject to Buyer's rights 
hereunder, if any of the Conditions Precedent have not been fulfilled within 
the applicable time periods, Buyer may:

          5.2.1  WAIVE AND CLOSE.  Waive the condition or disapproval and 
close Escrow in accordance with this Agreement, with or without adjustment or 
abatement of the Purchase Price; or

          5.2.2  TERMINATE.  Terminate this Agreement by written notice to 
Seller and to Escrow Agent, in which event Escrow Agent shall return to Buyer 
the Deposit together with any interest thereon, Buyer shall pay the 
cancellation charges of Title Company and Escrow Agent, and neither party 
shall thereafter have any rights or obligations to the other hereunder, other 
than pursuant to any provision hereof which expressly survives the 
termination of this Agreement.

     5.3  SELLER'S CONDITIONS.  The obligation of Seller to render 
performance under this Agreement is subject to the following conditions 
precedent (and conditions concurrent with respect to deliveries to be made by 
the parties at Closing), which conditions may be waived, or the time for 
satisfaction thereof extended, by Seller only in a writing executed by Seller 
(PROVIDED, HOWEVER, that any such waiver shall not affect Seller's ability to 
pursue any remedies it may have with respect to any breach hereunder by 
Buyer):

          5.3.1  BUYER'S DUE PERFORMANCE.  All of the representations and 
warranties of Buyer set forth in SECTION 8 shall be true and correct as of 
the Closing Date, and Buyer, on or prior to the Closing Date, shall have 
complied with and/or performed all of the obligations, covenants and 
agreements required on the part of Buyer to be complied with or performed 
pursuant to the terms of this Agreement.  On the Closing Date, Buyer shall 
deliver 

                                       8



a certificate, in the form of EXHIBIT "I" attached hereto, to Seller 
certifying that all of the representations and warranties of Buyer as set 
forth in SECTION 8 below are true and correct as of such date.

     5.4  FAILURE OF CONDITION.  Subject to Seller's rights hereunder in the 
event of a default by Buyer which results in the failure of a condition set 
forth in Section 5.3, if any of the Seller's conditions have not been 
fulfilled within the applicable time periods, Seller may terminate this 
Agreement by delivery of written notice to Buyer and Escrow Agent, in which 
event Escrow Agent shall return to Buyer the Deposit together with any 
interest thereon, the Buyer shall pay the cancellation charges of Title 
Company and Escrow Agent, and neither party shall thereafter have any rights 
or obligations to the other hereunder.  

6.  CLOSING.

     6.1  CLOSING DATE.  Subject to the provisions of this Agreement, the 
closing of the transactions contemplated by this Agreement (the "CLOSING") 
shall (unless otherwise mutually agreed to by the parties) take place at 9:00 
a.m. on or before the fifteenth calendar day following the Due Diligence 
Termination Date, at a mutually agreeable location in the Baltimore, 
Maryland, metropolitan area. As used herein, "CLOSING DATE" or "CLOSE OF 
ESCROW" shall mean the date upon which Closing actually occurs.  

     6.2  DELIVERIES BY SELLER.  At the Closing, Seller, at its sole cost and 
expense, shall deliver or cause to be delivered the following documents and 
instruments, each dated as of the Closing Date and executed by Seller, in 
addition to the other items and payments required by this Agreement to be 
delivered by Seller:

          6.2.1  DEED.   The original executed and acknowledged Deed 
conveying the Property to Buyer or its nominee;

          6.2.2  NONFOREIGN AFFIDAVIT.  The original Nonforeign Affidavit 
executed by Seller;

          6.2.3  BILL OF SALE AND ASSIGNMENT.  Two original counterparts of 
the Bill of Sale and Assignment; 

          6.2.4  SELLER'S CERTIFICATE.  A certificate, in the form of 
attached EXHIBIT "D", executed by Seller providing that all conditions to 
Seller's obligation to proceed to the Closing that Buyer was to satisfy or 
perform have been satisfied and performed, and that Seller's representations, 
covenants, and warranties made in or pursuant to this Agreement are true, 
accurate, correct and complete in all material respects as of the Close of 
Escrow; 

          6.2.5  PROOF OF AUTHORITY.  Such proof of Seller's authority and 
authorization to enter into this Agreement and the transaction contemplated 
hereby, and such 

                                       9



proof of the power and authority of the individual(s) executing or delivering 
any instruments, documents or certificates on behalf of Seller to act for and 
bind Seller as may be reasonably required by Title Company or Buyer; and

          6.2.6  OTHER.  Such other documents and instruments, signed and 
properly acknowledged by Seller, if appropriate, as may be reasonably 
acceptable to Seller and reasonably required by Buyer, Title Company or 
otherwise in order to effectuate the provisions of this Agreement and the 
Closing of the transactions contemplated herein.

     6.3  DELIVERIES BY BUYER.  At the Closing, Buyer, at its sole cost and 
expense, shall deliver or cause to be delivered the balance of the Purchase 
Price pursuant to SECTION 2 hereof and Buyer's share of prorations and 
Closing costs, as provided in SECTIONS 6.5 AND 6.6, respectively; and such 
other documents and instruments, signed and properly acknowledged by Buyer, 
if appropriate, as may reasonably be required by Title Company or otherwise 
in order to effectuate the provisions of this Agreement and the closing of 
the transactions contemplated herein, including, without limitation, the 
following:

          6.3.1  BILL OF SALE AND ASSIGNMENT.  Two original counterparts of 
the Bill of Sale and Assignment duly executed and acknowledged by Buyer.

          6.3.2  BUYER'S CERTIFICATE.  A certificate, in the form of attached 
EXHIBIT "I", executed by Buyer providing that Buyer's representations, 
covenants, and warranties made in or pursuant to this Agreement are true, 
accurate, correct and complete as of the Closing Date; and

          6.3.3  EVIDENCE OF AUTHORITY.  Reasonable evidence of Buyer's 
authority and authorization to enter into this Agreement and the transaction 
contemplated hereby, and reasonable evidence of the power and authority of 
the individual(s) executing or delivering any instruments, documents or 
certificates on behalf of Buyer to act for and bind Buyer.

     6.4  ACTIONS BY ESCROW AGENT.  Provided that Escrow Agent shall not have 
received written notice from Buyer or Seller of the failure of any condition 
to the Closing or of the termination this Agreement, at the Closing Escrow 
Agent shall disburse the Deposit to Seller.

     6.5  PRORATIONS.  Rentals, revenues, and other income, if any, from the 
Property, taxes, assessments, improvement bonds, service or other contract 
fees, utility costs, and other expenses affecting the Property shall be 
prorated between Buyer and Seller as of the Closing Date.  For purposes of 
calculating prorations, Buyer shall be deemed to be in title to the Property, 
and therefore entitled to the income and responsible for the expenses, after 
12:01 a.m. on the Closing Date.  Delinquent rentals more than thirty (30) 
days past due as of the Closing Date shall not be prorated on the Closing 
Date, and Seller shall retain its entire right, title and interest in and to 
such delinquent rentals (including the right to collect to same).  All 

                                      10



non-delinquent real estate taxes or assessments on the Property shall be 
prorated based on the actual current tax bill, but if such tax bill has not 
yet been received by Seller by the Closing Date or if supplemental taxes are 
assessed after the Closing for the period prior to the Closing, the parties 
shall make any necessary adjustment after the Closing by cash payment to the 
party entitled thereto so that Seller shall have borne all taxes, including 
all supplemental taxes, allocable to the period prior to the Closing and 
Buyer shall bear all taxes, including all supplemental taxes, allocable to 
the period after the Closing.  If any expenses attributable to the Property 
and allocable to the period prior to the Closing are discovered or billed 
after the Closing, the parties shall make any necessary adjustment after the 
Closing by cash payment to the party entitled thereto so that Seller shall 
have borne all expenses allocable to the period prior to the Closing and 
Buyer shall bear all expenses allocable to the period after the Closing.  
Buyer shall use its reasonable, good faith efforts (provided that such 
efforts will not require Buyer to incur any material out-of-pocket costs or 
engage in any litigation) to collect any delinquent rentals attributable or 
allocable to the period prior to the Closing, and if Buyer actually collects 
any such delinquent rentals Buyer shall promptly remit such amount, less the 
costs of collection thereof, to Seller following the Closing.  At Closing, 
Buyer shall also pay or cause to be paid to Seller the amount of $4,253 as 
reimbursement to Seller of the costs of tax assessment appeals undertaken by 
Seller, which appeals resulted in a reduction in the assessed value of the 
Property.  The provisions of this SECTION 6.5 shall survive the Closing for a 
period of one (1) year.

     6.6  CLOSING COSTS.  Seller shall pay one-half (1/2) of all transfer, 
recordation, stamp, sales and other taxes related to the transfer of the 
Property, and Seller's recording fees.  Buyer shall pay one-half (1/2) of all 
transfer, recordation, stamp, sales and other taxes related to the transfer 
of the Property, the cost of the Survey obtained by Buyer, all premiums, 
costs and fees related to delivery of the Owner's Title Policy, Escrow 
Agent's escrow fees and costs, Buyer's recording fees, and all other closing 
costs.  Buyer and Seller shall each pay their own respective attorney and 
advisor fees.

     6.7  DELIVERIES OUTSIDE OF ESCROW.  Seller shall deliver possession of 
the Property to Buyer upon the Closing.  Further, Seller hereby covenants and 
agrees to deliver to Buyer, on or prior to the Closing, the following items:

          6.7.1  [INTENTIONALLY OMITTED.]

          6.7.2  INTANGIBLE PROPERTY.  The Intangible Property, including, 
without limitation, the original Property Documents; and

          6.7.3  PERSONAL PROPERTY.  The Personal Property (other than the 
Personal Property which will be left upon, at or in the Land or the 
Improvements), including, without limitation, all keys to the Improvements.

                                      11



7.  SELLER'S REPRESENTATIONS AND WARRANTIES.

     Seller represents and warrants to and agrees with Buyer that, as of the 
date hereof and as of the Closing:

     7.1  TITLE.

          7.1.1  OWNERSHIP.  Seller is the legal and equitable owner of the 
Property, with full right to convey the same.  Seller has not granted any 
options or rights of first refusal or rights of first offer to third parties 
to purchase or otherwise acquire an interest in the Property.

          7.1.2  ENCUMBRANCES.  Other than Seller's mortgage in favor of 
Metropolitan Life Insurance Company, as successor to New England Mutual Life 
Insurance Company (the "FIRST MORTGAGE") and Seller's mortgage in favor of 
The Board of Trustees of the Joint Municipal Employees Benefits System (the 
"SECOND MORTGAGE" and together with the First Mortgage, the "MORTGAGE"), 
which will be satisfied or released and will not encumber the Property on or 
prior to the Closing (PROVIDED, that Sellers' liability on account of a 
failure to satisfy or release the Mortgage shall be as specified in SECTION 
9.3 hereof), the Property is now free and clear of all liens, encumbrances, 
claims, rights, demands, easements, leases, agreements, covenants, 
conditions, and restrictions of any kind created or suffered by Seller, 
except for those special exceptions disclosed in Schedule B - Section II of 
that certain Commitment for Title Insurance, dated effective November 16, 
1992, issued by Chicago Title Insurance Company as no. BC-4625, and at the 
Closing the Property will be free and clear of all liens, encumbrances, 
claims, rights, demands, easements, leases, agreements, covenants, 
conditions, and restrictions of any kind created or suffered by Seller, 
except for (A) the Permitted Exceptions, and (B) the Service Contracts.

          7.1.3  [Intentionally Omitted]

          7.1.4  STREETS.  Seller has received no notice of any existing, 
proposed, or contemplated plans to widen, modify, or realign any street or 
highway which affects the size of, use of, or set-backs on the Property.

     7.2  PROPERTY DOCUMENTS.  The Property Documents required to be 
delivered by Seller pursuant to the terms hereof constitute all of the 
material documents in Seller's direct possession or control or the direct 
possession of control of Seller's managing agents  and relating to the 
Property and each such Property Document as delivered by Seller constitutes a 
true, correct and complete copy of such Property Document in the possession 
or control of Seller.  There are no commitments or agreements affecting the 
Property and entered into by or on behalf of Seller, or otherwise known to 
Seller, which have not been (or will not be prior to the Closing, in 
accordance herewith) disclosed by Seller to Buyer in writing.

                                      12



      7.3  LEASES.  There currently are (and at the Closing there will be) no 
leases, tenancies or occupancies affecting, or in effect at, the Property, 
and there are no agreements, options or similar rights in favor of any third 
party which may give rise to any lease, tenancy or occupancy, and there are 
(and at the Closing there will be) no rentals attributable to periods after 
the Closing Date and no unrefunded security deposits.

     7.4  CONDITION OF PROPERTY.  Buyer understands and agrees that the 
Property is being sold "AS-IS" with no representations or warranties as to 
the physical condition of the Property except as expressly provided in this 
Agreement.

     7.5  SPECIAL ASSESSMENTS OR CONDEMNATION.  To the best of Seller's 
knowledge, there are not presently pending (i) any special assessments, 
except those shown as exceptions on the PTR, or (ii) condemnation actions 
against the Property or any part, and Seller has not received notice of any 
contemplated special assessments or eminent domain proceedings that would 
affect the Property.

     7.6  UTILITIES.  To the best of Seller's knowledge, all water, sewer, 
electric, gas, telephone, and drainage facilities, and all other utilities 
required by law or for the  operation of the Property for general office and 
warehouse use are installed to the property lines of the Property, have been 
connected to the buildings upon the Property, pursuant to valid permits, are 
in working order, and are adequate to service the Property.

     7.7  PERMITS.  Seller does not have in its possession any licenses, 
permits, easements, rights of way or proofs of dedication, or evidence of any 
of the foregoing, with respect to the Property.

     7.8  SERVICE CONTRACTS.  There are no service, maintenance, repair, 
management, leasing, or supply contracts or other contracts (including, 
without limitation, janitorial, elevator and landscaping agreements) 
affecting the Property, oral or written, except as set forth on the Schedule 
attached hereto as EXHIBIT "K" (the "SERVICE CONTRACTS") and, except as set 
forth on such Schedule, all Service Contracts are cancelable without cost at 
the option of Seller or the then owner of the Property upon not more than 
thirty (30) days prior written notice.  

     7.9  EMPLOYEES.  Seller has no employees.

     7.10  DEFAULTS.  Seller is not in default of Seller's obligations or 
liabilities pertaining to the Property (other than with respect to the 
Mortgage), and to the best of Seller's knowledge, there are no facts, 
circumstances, conditions, or events which, after notice or lapse of time, 
would constitute default. Seller has not received notice or information that 
any party to any of the Property Documents considers a breach or default to 
have occurred, and to the best of Seller's knowledge, Seller has no reason to 
believe that there is likely to be a default under any of the documents.

                                      13



     7.11  CONSENTS AND RELEASES.  Seller has obtained (or by the Closing, 
will obtain) all required consents, releases, and permissions to convey good 
and marketable title to Buyer.

     7.12  AUTHORITY.  This Agreement and all other documents delivered prior 
to or at the Closing (i) have been (or shall be prior to the delivery 
thereof) duly authorized, executed, and delivered by Seller; (ii) are (or 
shall be upon the delivery thereof) binding obligations of Seller; and (iii) 
do not violate the formation documents of Seller. Seller further represents 
that it is a limited partnership duly organized and existing in good standing 
under the laws of the State of Maryland with its principal place of business 
in Baltimore County, Maryland.

     7.13  BANKRUPTCY.  No filing or petition under the United States 
Bankruptcy Law or any insolvency laws, or any laws for composition of 
indebtedness or for the reorganization of debtors has been filed with regard 
to Seller or any general partner of Seller.

     7.14  CERTIFICATES OF OCCUPANCY.  Seller has no knowledge of any fact or 
circumstance which would prevent or inhibit Buyer's ability to receive a 
certificate of occupancy, or the equivalent permitting required by the 
applicable licensing agency, for the use and occupancy of the Property for 
general office and warehouse use.

     7.15  FOREIGN INVESTMENT IN REAL PROPERTY TAX ACT.  Seller is not a 
foreign person within the meaning of 42 USCS Section 1445(f)(3).

     7.16  APPROVALS.  Seller has not received any notice from any 
governmental entity to the effect that the Property is in violation of any 
Laws (as hereinafter defined) or other applicable requirement of any 
governmental entity for failure to obtain or maintain in effect any 
certifications, approvals, consents, authorizations, licenses, and permits 
required by any governmental authority in connection with the ownership, and 
current use and occupancy of the Property.

     7.17  INSURANCE.  There are currently in effect such insurance policies 
as are customarily maintained with respect to similar properties.  All 
premiums due on such insurance policies have been paid by Seller and Seller 
will maintain such insurance policies from the date hereof through the 
Closing Date or earlier termination of this Agreement.  Seller has not 
received and has no knowledge of any notice or request from any insurance 
company requesting the performance of any work or alteration with respect to 
the Property.  Seller has received no notice from any insurance company 
concerning, nor is Seller aware of, any defects or inadequacies in the 
Property which, if not corrected, would result in the termination of 
insurance coverage or increase its cost.  Seller hereby covenants to name 
Buyer as an additional insured during the period prior to Closing.

                                      14



     7.18  LITIGATION.  Except as set forth on the schedule attached hereto 
as EXHIBIT "M", there are no actions, suits or proceedings before any 
judicial or quasi-judicial body, by any governmental authority or other third 
party, pending, or to Seller's best knowledge, threatened, against or 
affecting all or any portion of the Property.  There are no actions, suits or 
proceedings pending, contemplated or threatened by Seller in connection with 
all or any portion of the Property or Seller's ownership, rights, use, 
development or maintenance thereof, including, without limitation, tax 
reduction proceedings; and from and after the date hereof, Seller shall not 
commence or allow to be commenced on its behalf any action, suit or 
proceeding with respect to all or any portion of the Property without the 
prior written consent of Buyer; provided, however, that Seller may, without 
Buyer's consent, engage in tax reduction proceedings that do not adversely 
affect Buyer provided that Seller keeps Buyer informed as to the nature, 
status and progress of such proceedings.  No attachments, execution 
proceedings, assignments for the benefit of creditors, insolvency, 
bankruptcy, reorganization or other proceedings are pending, or, to Seller's 
best knowledge, threatened, against Seller.  In the event any proceeding of 
the character described in this SECTION 7.18 is initiated prior to the 
Closing, Seller shall promptly advise Buyer in writing.

     7.19  COMPLIANCE WITH LAWS.  Seller has not received any notice that the 
Property is not in full compliance with any existing laws, rules, 
regulations, ordinances and orders of all applicable federal, state, city and 
other governmental authorities in effect as of the date of this Agreement 
(collectively, "LAWS"), including, without limitation, all Laws with respect 
to zoning, building, fire and health codes, environmental protection and 
sanitation and pollution control. 

     7.20  TOXIC OR HAZARDOUS MATERIALS.

          7.20.1  DEFINITIONS.

          (a)  "ENVIRONMENTAL CLAIM" means any claim, action, cause of 
action, investigation or notice (written or oral) by any person or entity 
alleging potential liability (including, without limitation, potential 
liability for investigatory costs, cleanup costs, governmental response 
costs, natural resources damages, property damages, personal injuries, or 
penalties) arising out of, based on or resulting from (i) the manufacture, 
treatment, processing, distribution, use, transport, handling, deposit, 
storage, disposal, leaking or other presence, or release into the environment 
of any "Material of Environmental Concern" (as defined below) in, at, on, 
under or about any location, whether or not owned or operated by Seller or 
(ii) circumstances forming the basis of any violation, or alleged violation, 
of any "Environmental Law" (as defined below).

          (b)  "ENVIRONMENTAL LAWS" means all federal, state, local and 
foreign laws and regulations relating to pollution or protection of human 
health or the environment (including, without limitation, laws and 
regulations relating to emissions, discharges, releases or threatened 
releases of Materials of Environmental Concern, or otherwise relating to the 

                                      15



manufacture, processing, distribution, use, treatment, storage, disposal, 
transport or handling of Materials of Environmental Concern.

          (c)  "MATERIAL OF ENVIRONMENTAL CONCERN" means chemicals, 
pollutants, contaminants, wastes, toxic substances, petroleum and petroleum 
products.

          7.20.2  REPRESENTATIONS AND WARRANTIES.  Seller represents and 
warrants to and agrees with Buyer that, as of the date hereof, and as of the 
Closing Date: (i) except as disclosed in the Environmental Reports, Seller 
has not received any notice that either the Property or Seller is not in full 
compliance with any applicable Environmental Laws relating to the Property; 
(ii) except as disclosed in the Environmental Reports, Seller has not 
received any communication (written or oral), whether from a governmental 
authority, citizens group, employee or otherwise, that alleges that Seller is 
not in such full compliance; (iii) Seller has not received any notice that 
there is any Environmental Claim pending or threatened with regard to the 
Property; and (iv) without in any way limiting the generality of the 
foregoing, except for materials used by tenants at the Property, Seller (it 
being acknowledged that this representation is made solely as to Seller and 
its employees and not Seller's predecessors-in-interest nor tenants of the 
Property) has not stored, disposed or arranged for the disposal of Materials 
of Environmental Concern on the Property.

     7.21  NO RESTRICTION ON ACCESS.  Except as contained in the Permitted 
Exceptions, Seller has not received any notice that any fact or condition 
exists which would prohibit or adversely affect the right of access to or 
from the Property from or to the existing highways and roads (all of such 
existing highways and roads being duly opened and dedicated to the 
municipality having jurisdiction thereof) and Seller has not received any 
notice of any pending or threatened restriction or denial, governmental or 
otherwise, upon such ingress and egress.

     7.22  SOILS.  Seller has not received any notice of any adverse soil 
conditions on the Property affecting the existing improvements thereon.

     7.23  STORM DRAINAGE.  Seller has not received any notice to the effect 
that all storm water flowing from the Property does not drain either into a 
public system or onto a permitted location and through easements for the 
benefit of the Property. 

     7.24  NO CONFLICTS.  The execution and delivery of this Agreement, the 
consummation of the transactions herein contemplated, and compliance with the 
terms of this Agreement will not conflict with, or, with or without notice or 
the passage of time or both, result in a breach of any of the terms or 
provisions of, or constitute a default under, any indenture, deed of trust, 
mortgage, loan agreement, or other document, or instrument or agreement, oral 
or written, to which Seller is a party or by which Seller or the Property is 
bound, or any applicable regulation of any governmental agency, or any 
judgment, order or decree of any court having jurisdiction over Seller or all 
or any portion of the Property.

                                      16



     7.25  SURVIVAL.  All of the representations, warranties and agreements 
of Seller set forth in this Agreement shall be true upo~ the execution of 
this Qgreement, shall be deemed to be repeated at and as of the Closing Date 
without the necessity of a separate certificatu with respect thereto and 
shall survive the delivery of the Deed and other Closing instruments and 
documents for a period of two (2) years.

     7.26  SELLER'S KNOWLEDGE.  As used herein, the phrases "to Seller's best 
knowledge", "to the best of Seller's knowledge" and words of similar import 
shall mean the actual knowledge of only Dennis Townsend, Judy Waranch and 
Daniel Cramer and no other person or entity.  Seller represents and warrants 
that the foregoing persons are the persons affiliated with Seller with the 
primary responsibility for the Property, and that no other person or entity 
affiliated with or controlling, controlled by, or under common control with 
Seller possesses equal or superior knowledge with respect to the Property.

8.  BUYER'S REPRESENTATIONS AND WARRANTIES.

     Buyer represents and warrants to and agrees with Seller that, as of the 
date hereof, and as of the Closing Date:

     8.1  NO CONFLICTS.  The execution and delivery of this Agreement, the 
consummation of the transactions herein contemplated, and compliance with the 
terms of this Agreement will not conflict with, or, with or without notice or 
the passage of time or both, result in a breach of any of the terms or 
provisions of, or constitute a default under, any indenture, deed of trust, 
mortgage, loan agreement, or other document or instrument to which Buyer is a 
party or by which Buyer is bound, or any applicable regulation of any 
governmental agency, or any judgment, order or decree of any court having 
jurisdiction over Buyer or all or any portion of the Property.

     8.2  DUE ORGANIZATION; CONSENTS.  Buyer is a corporation duly organized 
and existing in good standing under the laws of the State of Maryland with 
its principal place of business in California.  All requisite corporate 
action has been taken by Buyer in connection with entering into this 
Agreement, and will be taken prior to the Closing in connection with the 
execution and delivery of the instruments referenced herein and the 
consummation of the transactions contemplated hereby.  No consent of any 
partner, shareholder, beneficiary, creditor, investor, judicial or 
administrative body, governmental authority or other party is required in 
connection herewith which has not been obtained.

     8.3  BUYER'S AUTHORITY; VALIDITY OF AGREEMENTS.  Subject to Buyer's 
board of directors' approval (which, unless Buyer has theretofore terminated 
this Agreement, shall be obtained on or before the expiration of the Due 
Diligence Period), Buyer has full right, power and authority to purchase the 
Property from Seller as provided in this Agreement and to carry out its 
obligations hereunder. The individual(s) executing this Agreement and the 
instruments referenced herein on behalf of Buyer have the legal power, right 
and actual authority to bind 

                                      17



Buyer to the terms hereof and thereof.  This Agreement is and all other 
documents and instruments to be executed and delivered by Buyer in connection 
with this Agreement shall be duly authorized, executed and delivered by Buyer 
and shall be valid, binding and enforceable obligations of Buyer.

     8.4  SURVIVAL.  All of the representations, warranties and agreements of 
Buyer set forth in this Agreement shall be true upon the execution of this 
Agreement, shall be deemed to be repeated at and as of the Closing Date 
without the necessity of a separate certificate with respect thereto and 
shall survive the delivery of the Deed and other Closing instruments and 
documents for a period of two (2) years.

9.  ADDITIONAL COVENANTS OF SELLER.

     Seller agrees that between the date hereof and the Closing Date:

     9.1  TITLE.  Except as may be expressly permitted hereby, Seller shall 
not directly or indirectly sell, assign or create any right, title or 
interest whatsoever in or to the Property, or create or permit to exist 
thereon any lien, charge or encumbrance other than the Permitted Exceptions 
and the Mortgage, or enter into any agreement to do any of the foregoing, 
including, without limitation, any new leases, occupancies or tenancies or 
new Service Contracts (other than Service Contracts which may be terminated 
by Buyer without penalty upon not more than 30 days notice), without the 
prior written consent of Buyer. 

     9.2  NOTICE OF CHANGE IN CIRCUMSTANCES.  Seller shall promptly notify 
Buyer of any change in any condition with respect to the Property or any 
portion thereof or of any event or circumstance of which Seller becomes aware 
subsequent to the date of this Agreement which (a) materially, adversely 
affects the Property or any portion thereof or the use or operation of the 
Property or any portion thereof, (b) makes any representation or warranty of 
Seller to Buyer under this Agreement materially untrue or misleading or (c) 
makes any covenant of Seller under this Agreement incapable or materially 
less likely of being performed, it being expressly understood that Seller's 
obligation to provide information to Buyer under this SECTION 9.2 shall in no 
way relieve Seller of any liability for a breach by Seller of any of its 
representations, warranties or covenants under this Agreement.  

     9.3  NO DEFAULTS; MAINTENANCE OF PROPERTY.  Except with respect to the 
Mortgage, Seller shall not materially default beyond any applicable grace 
period with respect to the performance of any obligation relating to the 
Property, such obligations to include, without limitation, the payment of all 
amounts due and the performance of all obligations with respect to any 
existing indebtedness or existing leases or contracts.  Seller shall operate 
and maintain the Property in accordance with Seller's practice as of the date 
of this Agreement and all applicable laws, rules and regulations affecting 
the Property or any portion thereof.  With respect to the Mortgage, Seller 
shall keep Buyer apprised of any action by or on behalf of the mortgagees 
thereunder to exercise any remedies against the Property, and of any 
agreement 

                                      18



between Seller and such mortgagees with respect to the Mortgage and the 
satisfaction thereof, and shall provide copies of all documents and 
agreements executed by Seller and such mortgages and all correspondence to or 
from such mortgagees.  In the event that Seller is unable to convey the 
Property to Buyer as required hereby as a result, directly or indirectly, of 
the Mortgage, upon delivery of reasonable written evidence that Seller is 
unable to convey the Property as required hereby, this Agreement shall 
terminate and be of no further force or effect, in which event (x) Escrow 
Agent shall return to Buyer the Deposit together with any interest thereon, 
(y) Seller shall reimburse Buyer for all of Buyer's reasonable out-of-pocket 
expenses incurred in connection with Buyer's investigations of the Property 
and the negotiation and execution of this Agreement and any documents to be 
delivered pursuant hereto (including, without limitation, cancellation 
charges of Title Company and Escrow Agent, reasonable attorneys' and 
consultants' fees, costs and disbursements), which reimbursement, in the 
aggregate, shall not exceed $50,000, and (z) neither party shall thereafter 
have any rights or obligations to the other hereunder.  Seller and Buyer 
acknowledge that (a) an affiliate of Seller ("SELLER AFFILIATE") (i) has 
entered into a written agreement to purchase one of the loans constituting 
part of the Mortgage (the "FIRST MORTGAGE AGREEMENT"), and (ii) has executed 
and sent to the holder of the other loan constituting part of the Mortgage an 
agreement to purchase such other loan (together with the First Mortgage 
Agreement, the "MORTGAGE AGREEMENTS"), (b) the date by which Seller Affiliate 
must close the transactions which are the subjects of the Mortgage Agreements 
is prior to the date by which the Closing must occur hereunder, and (c) 
neither Seller nor Seller Affiliate intends to use its own funds or the funds 
of its principals or other affiliates to purchase the loans.  Seller agrees 
to use its good faith efforts to cause Seller Affiliate to fulfill its 
obligations under the Mortgage Agreements, but such obligation shall not (X) 
require Seller or Seller Affiliate to fund the purchases of the loans from 
Seller's, Seller Affiliate's or any other affiliate's funds or from the funds 
of the principals of Seller, Seller Affiliate or any other affiliate, (Y) 
require Seller to refinance the Property before Closing on terms that Seller, 
in its sole discretion, does not deem to be in its best interests, or (Z) 
require Seller or Seller Affiliate to pay any extension fees to extend the 
closing dates under the Mortgage Agreements except as Seller Affiliate deems 
appropriate in its sole discretion; PROVIDED, HOWEVER, that nothing set forth 
in clauses (a), (b), (c), (X), (Y) or (Z) of this SECTION 9.3 shall relieve 
Seller of its obligations under SECTION 9.3(y) in the event Seller is unable 
to convey the Property as required hereby.

     9.4  EXCLUSIVE NEGOTIATIONS.  Seller shall (i) remove the Property from 
the market, (b) cease and refrain from any and all negotiations with any 
other prospective optionees or purchasers of the Property, (c) advise Buyer 
of any negotiations with current or potential tenants at the Property.

  10.  RISK OF LOSS.

     10.1  CONDEMNATION.  If, prior to the Closing Date, all or any portion 
of the Property is taken by condemnation or eminent domain (or is the subject 
of a pending or contemplated taking which has not been consummated), Seller 
shall notify Buyer of such fact.  

                                      19



In such event, Buyer shall have the option to terminate this Agreement upon 
written notice to Seller given not later than fifteen (15) days after receipt 
of such notice from Seller.  Upon such termination, Escrow Agent shall return 
the Deposit, together with all interest and earnings accrued thereon, to 
Buyer, Buyer shall pay the cancellation charges of Escrow Agent and Title 
Company, and neither party shall have any further rights or obligations 
hereunder, other than pursuant to any provision hereof which expressly 
survives the termination of this Agreement.  If Buyer does not elect to 
terminate this Agreement, Seller shall assign and turn over to Buyer at the 
Closing, and Buyer shall be entitled to receive and keep, all awards for the 
taking by condemnation and Buyer shall be deemed to have accepted the 
Property subject to the taking without reduction in the Purchase Price.

     10.2  CASUALTY.  Prior to Closing and notwithstanding the pendency of 
this Agreement, the entire risk of loss or damage by earthquake, flood, 
landslide, fire or other casualty shall be borne and assumed by Seller.  If, 
prior to Closing any part of the Property is damaged or destroyed by 
earthquake, flood, landslide, fire or other casualty, Seller shall 
immediately notify Buyer of such fact.  In such event, Buyer shall have the 
option to terminate this Agreement in accordance with the preceding section 
upon written notice to the Seller given not later than fifteen (15) days 
after receipt of any such notice from Seller.  At the Closing, if Buyer does 
not elect to terminate this Agreement, Seller shall assign and turn over, and 
Buyer shall be entitled to receive and keep, all insurance proceeds payable 
with respect to such destruction (which shall then be repaired or not at 
Buyer's option and cost), plus Seller shall pay over to Buyer an amount equal 
to the deductible amount with respect to the insurance and the parties shall 
proceed to Closing pursuant to the terms hereof without modification of the 
terms of this Agreement and without any reduction in the Purchase Price.  If 
Buyer does not elect to terminate this Agreement by reason of any casualty, 
Buyer shall have the right to participate in any adjustment of the insurance 
claim.

11.  LIQUIDATED DAMAGES; SPECIFIC PERFORMANCE.

     11.1  LIQUIDATED DAMAGES.  IN THE EVENT THAT THE ESCROW AND THIS 
TRANSACTION FAIL TO CLOSE SOLELY AS A RESULT OF THE DEFAULT OF BUYER IN 
PERFORMANCE OF ITS OBLIGATIONS UNDER THIS AGREEMENT, BUYER AND SELLER AGREE 
THAT SELLER'S ACTUAL DAMAGES WOULD BE IMPRACTICABLE OR EXTREMELY DIFFICULT TO 
FIX.  THE PARTIES THEREFORE AGREE THAT IN THE EVENT THAT ESCROW AND THIS 
TRANSACTION FAIL TO CLOSE SOLELY AS A RESULT OF THE DEFAULT OF BUYER IN THE 
PERFORMANCE OF ITS OBLIGATIONS HEREUNDER AND SELLER IS READY, WILING AND ABLE 
TO PERFORM ITS' OBLIGATIONS HEREUNDER, SELLER, AS SELLER'S SOLE AND EXCLUSIVE 
REMEDY, IS ENTITLED TO LIQUIDATED DAMAGES IN THE AMOUNT OF THE DEPOSIT, 
INCLUSIVE OF INTEREST THEREON. IN THE EVENT ESCROW FAILS TO CLOSE SOLELY AS A 
RESULT OF BUYER'S DEFAULT AND SELLER IS READY, WILLING AND ABLE TO PERFORM 
ITS' OBLIGATIONS HEREUNDER, THEN (1) THIS AGREEMENT AND THE RIGHTS AND 
OBLIGATIONS OF 

                                      20



BUYER AND SELLER HEREUNDER AND THE ESCROW CREATED HEREBY SHALL TERMINATE, AND 
(2) ESCROW AGENT SHALL, AND IS HEREBY AUTHORIZED AND INSTRUCTED TO, DELIVER 
THE DEPOSIT TO SELLER AND RETURN PROMPTLY TO BUYER AND SELLER ALL OTHER FUNDS 
OR DOCUMENTS DEPOSITED BY THEM, RESPECTIVELY, INTO ESCROW WHICH ARE THEN HELD 
BY ESCROW AGENT.  SELLER AND BUYER ACKNOWLEDGE THAT THEY HAVE READ AND 
UNDERSTAND THE PROVISIONS OF THIS SECTION 11.1, AND BY THEIR INITIALS 
IMMEDIATELY BELOW AGREE TO BE BOUND BY ITS TERMS.

__________________                                         __________________
     Seller                                                      Buyer       

     11.2  DEFAULT BY SELLER.  In the event that Buyer is ready, willing and 
able to perform its obligations hereunder but the Closing of the transaction 
contemplated in this Agreement does not occur by reason of any default by 
Seller, Escrow Agent shall return the Deposit to Buyer together with all 
interest earned thereon.  Buyer's sole remedy, at law or in equity, for a 
default by Seller hereunder at or prior to the Closing shall be an action for 
specific performance of this Agreement, Buyer having no right to bring an 
action in connection with such a default for damages against Seller.

     11.3  RIGHTS AND REMEDIES AFTER CLOSING.  Nothing contained in either 
Section 11.1 or 11.2 hereof is intended to limit the rights and remedies of 
Buyer and Seller after the Closing.

12.  BROKERS.

     Seller and Buyer each hereby represent, warrant to and agree with each 
other that there are no broker or finder fees or commissions payable in 
connection with the transaction contemplated hereby, other than those payable 
to Carey Winston and to Smithy Braedon/ONCOR International (which shall be 
paid by Seller), and Seller hereby further represents, warrants to and agrees 
with Buyer that there are no leasing commissions payable in connection with 
the Property or any part thereof.  Seller shall indemnify, protect, defend 
and hold Buyer harmless from and against any and all claims, losses, damages, 
costs and expenses (including attorney's fees) incurred by Buyer by reason of 
any breach or inaccuracy of the representations, warranties and agreements of 
Seller contained in this SECTION 12.  Buyer shall indemnify, protect, defend 
and hold Seller harmless from and against any and all claims, losses, 
damages, costs and expenses (including attorneys' fees) incurred by Seller by 
reason of any breach or inaccuracy of the representation, warranty and 
agreement of Buyer contained in this SECTION 12.  The provisions of this 
SECTION 12 shall survive the Closing or earlier termination of this Agreement.


                                      21



13.  CONFIDENTIALITY.

     13.1  BUYER.  Buyer agrees that until Closing, except as otherwise 
provided herein or required by law, and except for the exercise by Buyer of 
any remedy hereunder, Buyer shall (a) keep confidential the pendency of this 
transaction and the documents and information supplied by Seller to Buyer, 
(b) disclose such information only to Buyer's agents, employees, contractors, 
consultants, advisors, investment bankers, investors, or attorneys, as well 
as lenders (if any) and title company personnel, with a need to know in 
connection with Buyer's review and consideration of the Property, provided 
that Buyer shall inform all persons receiving such information from Buyer of 
the confidentiality requirement and (to the extent within Buyer's control) 
cause such confidence to be maintained, and (c) upon the termination of this 
Agreement prior to Closing, return to Seller promptly upon request all copies 
of documents and materials supplied by Seller.  Disclosure of information by 
Buyer shall not be prohibited if that disclosure is of information that is or 
becomes a matter of public record or public knowledge as a result of the 
Closing of this transaction or from sources other than Buyer or its agents, 
employees, contractors, consultants or attorneys.  

     13.2  SELLER.  Seller agrees that both prior to and after Closing, 
except as otherwise provided herein or required by law, and except for the 
exercise by Seller of any remedy hereunder, Seller shall (a) keep 
confidential the pendency of this transaction with Buyer and the identity of 
Buyer and the relationship between Buyer and the entity to which Buyer may 
assign this Agreement or which Buyer designates as the party to whom Seller 
shall convey the Property at the Closing, and (b) disclose such information 
only to Seller's agents, employees, contractors, consultants, advisors, 
investment bankers, investors, partners or attorneys, as well as lenders (if 
any) and title company personnel, with a need to know such information in 
connection with effecting this transaction, provided that Seller shall inform 
all such persons receiving such confidential information from Seller of the 
confidentiality requirement and (to the extent within Seller's control) cause 
such confidence to be maintained.  Disclosure of the pendency of this 
transaction by Seller shall not be prohibited if that disclosure is of 
information that is or becomes a matter of public record or public knowledge 
as a result of the Closing of this transaction or from sources other than 
Seller or its agents, employees, contractors, consultants or attorneys.

14.  MISCELLANEOUS PROVISIONS.

     14.1  GOVERNING LAW.  The Agreement and the legal relations between the 
parties hereto shall be governed by and construed and enforced in accordance 
with the laws of the State of Maryland, without regard to its principles of 
conflicts of law. Each of the parties hereto consent and submit to 
jurisdiction and venue in any competent court in the State of Maryland.

     14.2  ENTIRE AGREEMENT; MODIFICATIONS; WAIVER.

                                      22



          14.2.1  ENTIRE AGREEMENT.  This Agreement, including the exhibits 
and schedules hereto, constitutes the entire agreement between Buyer and 
Seller pertaining to the subject matter hereof and supersedes all prior 
agreements, understandings, letters of intent, negotiations and discussions, 
whether oral or written, of the parties, and there are no warranties, 
representations or other agreements, express or implied, made to either party 
by the other party in connection with the subject matter hereof except as 
specifically set forth herein or in the documents delivered pursuant hereto 
or in connection herewith.  Without limiting the foregoing, upon execution of 
this Agreement, that certain Letter of Intent dated June 13, 1997, as amended 
to date, between Buyer and Seller, shall terminate and shall be of no further 
force and effect.

          14.2.2  MODIFICATION.  No supplement, modification, waiver or 
termination of this Agreement shall be binding unless executed in writing by 
the party to be bound thereby.  No waiver of any provision of this Agreement 
shall be deemed or shall constitute a waiver of any other provision hereof 
(whether or not similar), nor shall such waiver constitute a continuing 
waiver unless otherwise expressly provided.

     14.3  NOTICES.  All notices, consents, requests, reports, demands or 
other communications hereunder (collectively, "NOTICES") shall be in writing 
and may be given personally, by registered or certified mail, by Federal 
Express (or other reputable overnight delivery service) or by facsimile 
transmission.

To Buyer:                    Alexandria Real Estate Equities, Inc.
                             251 South Lake Avenue, Suite 700
                             Pasadena, California 91101
                             Attention: Mr. Joel S. Marcus
                             Telephone: (818) 578-0777
                             Facsimile: (818) 578-0770

With a Copy To:              Alexandria Real Estate Equities, Inc.
                             11440 West Bernardo Court, Suite 170
                             San Diego, California 92127
                             Attention: Gary A. Kreitzer, Esq.
                             Telephone: (619) 592-6801
                             Facsimile: (619) 592-6814

And With A                   Skadden, Arps, Slate, Meagher & Flom LLP
Copy To:                     300 South Grand Avenue, Suite 3400
                             Los Angeles, California  90071
                             Attention:  George M. Eshaghian, Esq.
                             Telephone:  (213) 687-5215
                             Facsimile:  (213) 687-5600

                                      23



To Seller:                   Quince Orchard Road Limited Partnership II
                             210 West Pennsylvania Avenue, Suite 610
                             Towson, Maryland  21204
                             Attention:  Mr. Dennis Townsend
                             Telephone:  (410) 321-1900
                             Facsimile: (410) 321-1901

With A Copy To:              Lenrow, Kohn, Howard & Oliver
                             Seven St. Paul Street, Suite 940
                             Baltimore, Maryland  21202
                             Attention:  James C. Oliver, Esq.
                             Telephone:  (410) 962-0554
                             Facsimile:  (410) 962-0558

or to such other address or such other person as the addressee party shall 
have last designated by notice to the other party.  Notices given by 
facsimile transmission shall be deemed to be received when confirmed; and all 
other Notices shall have been deemed to have been given when received.

     14.4  EXPENSES.  Subject to the allocation of closing costs provided in 
SECTION 6.6 hereof, whether or not the transactions contemplated by this 
Agreement shall be consummated, all fees and expenses incurred by any party 
hereto in connection with this Agreement shall be borne by such party.

     14.5  ASSIGNMENT.  

          14.5.1  SELLER'S RIGHT TO ASSIGN.  Seller shall not have the right, 
power, or authority to assign or mortgage this Agreement or any portion of 
this Agreement, (except that Seller, without Buyer's consent, may assign its 
rights to all proceeds of this Agreement to a lender but such assignment 
shall in no way relieve Seller of its obligations hereunder) or to delegate 
any duties or obligations arising under this Agreement, voluntarily, 
involuntarily, or by operation of law, without Buyer's prior written consent.

          14.5.2  BUYER'S RIGHT TO ASSIGN.  Except as otherwise provided in 
this Agreement, Buyer shall have the right, power, and authority to assign 
this Agreement or any portion of this Agreement or to delegate any duties or 
obligations arising under this Agreement, voluntarily, involuntarily or by 
operation of law, without Seller's consent. Upon an assignment, Buyer shall 
not be relieved of all obligations under this Agreement.

      14.6  SEVERABILITY.  Any provision or part of this Agreement which is 
invalid or unenforceable in any situation in any jurisdiction shall, as to 
such situation and such jurisdiction, be ineffective only to the extent of 
such invalidity and shall not affect the enforceability of the remaining 
provisions hereof of validity or enforceability of any such provision in any 
other situation or in any other jurisdiction.

     14.7  SUCCESSORS AND ASSIGNS; THIRD PARTIES. Subject to and without 
waiver of the provisions of SECTION 14.5 hereof, all of the rights, duties, 
benefits, liabilities and obligations of the parties shall inure to the 
benefit of, and be binding upon, their respective successors and assigns.  
Except as specifically set forth or referred to herein, nothing herein 

                                      24



expressed or implied is intended or shall be construed to confer upon or give 
to any person, other than the parties hereto and their successors or assigns, 
any rights or remedies under or by reason of this Agreement.

     14.8  COUNTERPARTS.  This Agreement may be executed in as many 
counterparts as may be deemed necessary and convenient, and by the different 
parties hereto on separate counterparts, each of which, when so executed, 
shall be deemed an original, but all such counterparts shall constitute but 
one and same instrument.

     14.9  HEADINGS.  The Section headings of this Agreement are for 
convenience of reference only and shall not be deemed to modify, explain, 
restrict, alter or affect the meaning or interpretation of any provision 
hereof.

     14.10  TIME OF THE ESSENCE.  Time shall be of the essence with respect 
to all matters contemplated by this Agreement.

     14.11  FURTHER ASSISTANCE.  In addition to the actions recited herein 
and contemplated to be performed, executed, and/or delivered by Seller and 
Buyer, Seller and Buyer agree to perform, execute and/or deliver or cause to 
be performed, executed and/or delivered at Closing or after Closing any and 
all such further acts, deeds, instruments and assurances as may be reasonably 
required to consummate the transactions contemplated hereby, including, 
without limitation, such further instruments as may be required to transfer 
all of Seller's rights to the Property.

     14.12  NUMBER AND GENDER.  Whenever the singular number is used, and 
when required by the context, the same includes the plural, and the masculine 
gender includes the feminine and neuter genders.

     14.13  CONSTRUCTION.  This Agreement shall not be construed more 
strictly against one party hereto than against any other party hereto merely 
by virtue of the fact that it may have been prepared by counsel for one of 
the parties.

     14.14  POST-CLOSING ACCESS TO RECORDS. Upon receipt by Seller of Buyer's 
reasonable written request at anytime and from time to time within a period 
of two (2) years after the Closing, Seller shall make available (or cause its 
property manager or asset manager, as applicable, to make available) to Buyer 
and its accountants and designees, for inspection and copying during normal 
business hours and at Buyer's sole cost and expense, (i) all accounting 
records relating to the Property for the calendar year period ended December 
31, 1996, and for the period from January 1, 1997 through the Closing Date, 
including, without limitation, all general ledgers, cash receipts, cancelled 
checks and other accounting documents or information reasonably requested by 
Buyer and related to the Property, and (ii) all other records related to the 
Property, in either case whether in the possession or control of Seller or 
Seller's property manager, asset manager or other agent.  In addition, in 
connection with any such

                                      25



accounting information, Seller shall request that its managing agent and/or 
auditors provide, at Buyer's expense, Buyer and Buyer's accountants with a 
representation letter in form and substance customarily provided to certified 
public accountants when performing an audit in accordance with generally 
accepted auditing standards.

     14.15  EXHIBITS.  All exhibits attached hereto are hereby incorporated 
by reference as though set out in full herein.

     14.16  ATTORNEY'S FEES.  Notwithstanding the provisions of Section 11.1 
and 11.2, in the event that either party hereto brings an action or 
proceeding against the other party to enforce or interpret any of the 
covenants, conditions, agreements or provisions of this Agreement, the 
prevailing party in such action or proceeding shall be entitled to recover 
all costs and expenses of such action or proceeding, including, without 
limitation, attorney's fees and fees and costs of expert witnesses.  The 
provisions of this Section 14.16 shall survive Closing.

     14.17  BUSINESS DAYS.  In the event that the date for performance of any 
covenant or obligation hereunder shall fall on a Saturday, Sunday or other 
day which is not a business day, the date for performance thereof shall be 
extended to the next business day.

     14.18  EXCHANGE.  Seller may consummate the sale of the Property as part 
of a so-called like kind exchange (the "Exchange") pursuant to Section 1031 
of the Internal Revenue Code of 1986, as amended (the "Code"), provided that: 
(i) the Closing shall not be delayed or affected in any way by reason of the 
Exchange nor shall the consummation or accomplishment of the Exchange be a 
condition to Seller's obligations under this Agreement; (ii) Seller shall 
accomplish the Exchange through a qualified intermediary and Buyer shall not 
be required to (A) acquire or hold title to any property, (B) incur any 
expense or liability, or (C) diminish or waive any of its rights or remedies 
against Seller, for purposes of consummating the Exchange; (iii) Seller shall 
indemnify, defend and hold Buyer and its officers, directors, employees, 
agents, affiliates and attorneys harmless from and against any and all 
liabilities, claims, losses, actions, costs and expenses in connection with 
the Exchange; and (iv)  Seller shall pay and reimburse Buyer for any costs 
and expenses (or any increased costs and expenses) associated with the 
Exchange, including, without limitation, reasonable attorneys' fees, transfer 
taxes and recording costs.  Buyer shall not by this Agreement or acquiescence 
or consent to the Exchange (1) have its rights under this Agreement affected 
or diminished in any manner, or (2) be responsible for compliance with or be 
deemed to have warranted to Seller that the Exchange complies with or 
satisfies Section 1031 of the Code.

                                      26




     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as 
of the day and year first above written.

                             BUYER:

                             ALEXANDRIA REAL ESTATE EQUITIES, INC.,
                             a Maryland corporation



                             By: /s/ Alan D. Gold
                                ----------------------------------------
                                  Name: Alan D. Gold
                                       ---------------------------------
                                  Its:  President
                                      ----------------------------------



                             SELLER:

                             QUINCE ORCHARD ROAD LIMITED PARTNERSHIP II, a
                             Maryland limited partnership

                             By:  DWT Venture, Incorporated,
                                  a Maryland corporation
                             Its: General Partner



                                  By: /s/ Dennis Townsend
                                     ---------------------------------------
                                         Name: Dennis Townsend
                                              ------------------------------
                                         Its:  President
                                             -------------------------------


ESCROW AGENT:
The undersigned Escrow Agent accepts the foregoing Agreement of Purchase and 
Sale and agrees to act as Escrow Agent under this Agreement in strict 
accordance with its terms.

Chicago Title Insurance Company,
a Missouri corporation



By: /s/ Charles S. Carroccio, Jr.
   -------------------------------
   Name: Charles S. Carroccio, Jr.
   Its:  Office Counsel

                                      27




                               LIST OF EXHIBITS


EXHIBIT "A"   LEGAL DESCRIPTION 

EXHIBIT "B"   [INTENTIONALLY OMITTED] 

EXHIBIT "C"   FORM OF DEED 

EXHIBIT "D"   SELLER'S CERTIFICATE

EXHIBIT "E"   [INTENTIONALLY OMITTED]

EXHIBIT "F"   BILL OF SALE AND ASSIGNMENT

EXHIBIT "G"   [INTENTIONALLY OMITTED] 

EXHIBIT "H"   NONFOREIGN AFFIDAVIT

EXHIBIT "I"   BUYER'S CERTIFICATE

EXHIBIT "J"[INTENTIONALLY OMITTED]

EXHIBIT "K"   SERVICE CONTRACTS

EXHIBIT "L"   [INTENTIONALLY OMITTED] 

EXHIBIT "M"   LITIGATION



                                      28


                                     EXHIBIT "A"
                                           
                                  LEGAL DESCRIPTION
                                           
                                      ATTACHED.


All that lot or parcel of land located in the 9th Election District of 
Montgomery County, Maryland and described as follows:

Lot Number Six (6) in Block Letter "C" in the subdivision known as "Diamond 
Farms" as per plat filed in Plat Book 116 at Plat 136789, among the Land 
Records of Montgomery County, Maryland.

Parcel I.D. No.: 9-206-2153278




                                     EXHIBIT "B"
                                           
                               [INTENTIONALLY OMITTED] 


                                     EXHIBIT "C"
                                           
                                     FORM OF DEED
                                           
                                      ATTACHED.


                                     DEED
                                     ----

     THIS DEED, made this __ day of __________, 199_, by and between 
__________________, Maryland limited partnership ("Grantor") and 
___________________, a ______________corporation ("Grantee"),

     WITNESSETH. THAT IN CONSIDERATION of Grantee's payment to Grantor of 
$__________ (which is the actual consideration paid or to be paid for the 
within conveyance), and for other good and valuable consideration, the 
receipt and adequacy of which are hereby acknowledged by Grantor, Grantor 
hereby grants and conveys to Grantee and Grantee's successors and assigns, in 
fee simple, all of that parcel of land ("the Land") in Montgomery County, 
Maryland which is described in Exhibit A hereto,

          BEING ALL OF THAT PROPERTY which______________
          ______________________________________________,
          was conveyed by____________________ to Grantor,
  
     TOGETHER WITH  all improvements on the Land, and all rights, alleys, 
ways, waters, privileges, appurtenances and advantages belonging or in any 
way appurtenant to the Land or such improvements (all of which Land, 
improvements and appurtenances are referred to collectively herein as "the 
Property"),

     TO HAVE AND TO HOLD the Property to the use and benefit of Grantee and 
Grantee's successors and assigns, in fee simple.

     GRANTOR HEREBY COVENANTS that Grantor will warrant specially such title, 
and will give such further assurances thereof as may be requisite.

     IN WITNESS WHEREOF, Grantor has executed and ensealed this Deed or 
caused it to be executed and ensealed on its behalf by its duly authorized 
representatives, the date first above written.

WITNESS:                               -------------------------------------
                                       BY: _________________, a Maryland
                                           Corporation, its general partner

                                       By: 
- ---------------------------------          ---------------------------------
                                           Name:
                                           Title:

                                       1


STATE OF MARYLAND: COUNTY OF __________________: TO WIT:

     I CERTIFY that on this __day of _____________, 1996, before me, a Notary 
Public for the state and county aforesaid, personally appeared 
______________, known to me or satisfactorily proven to be the person whose 
name is subscribed to the foregoing instrument, who acknowledged that he/she 
is the _________________ of ______________, the general partner of 
__________________, a Maryland limited partnership; that he/she has been duly 
authorized to execute, and has executed, such instrument on behalf of said 
limited partnership for the purposes therein set forth; and that the same is 
its act and deed.

     IN WITNESS WHEREOF, I have set my hand and Notarial Seal, the date first 
above written.


                                       ---------------------------------
                                       Notary Public

My commission expires on ________________.

     I CERTIFY that this instrument was prepared by or under the supervision 
of the undersigned. An attorney duly admitted to practice before the Court 
of Appeals of Maryland.


                                       ---------------------------------
                                       James C. Oliver




                                       2


                                   EXHIBIT A
                                   ---------

                              Description of Land
                              -------------------

     ALL OF THAT LAND in Montgomery County, Maryland which is described as 
follows:




















                                       3


                                     EXHIBIT "D"
                                           
                                 SELLER'S CERTIFICATE

The undersigned hereby certifies as follows:


    1.  All conditions to Seller's obligations to proceed to Closing which were
to be satisfied or performed by ALEXANDRIA REAL ESTATE EQUITIES, INC., a
Maryland corporation ("BUYER"), as provided in that certain Purchase and Sale
Agreement (the "PURCHASE AGREEMENT") entered into between Quince Orchard Road
Limited Partnership II, a Maryland limited partnership ("SELLER") and Buyer,
dated as of __________, 1997 have either been satisfied or waived.

    2.  All representations, covenants, and warranties made in or pursuant to
the Purchase Agreement by Seller are true, accurate, correct and complete in all
material respects as of the date of this certificate.

    3.  Buyer is entitled to rely on this certificate in connection with the
Closing (as defined in the Purchase Agreement).

    Seller has executed this certificate effective as of____________, 1997.

                             SELLER

                             QUINCE ORCHARD ROAD LIMITED PARTNERSHIP II, a
                             Maryland limited partnership

                             By:  DWT Venture, Incorporated,
                                  a Maryland corporation
                             Its: General Partner


                                  By:
                                       ---------------------------------
                                       Name:
                                       Its:


                                     EXHIBIT "E"
                               [INTENTIONALLY OMITTED]

                                     EXHIBIT "F"

                             BILL OF SALE AND ASSIGNMENT

    THIS BILL OF SALE AND ASSIGNMENT ("BILL OF SALE") is made as of the ____
day of ____________, 1997, by QUINCE ORCHARD ROAD LIMITED PARTNERSHIP II, a
Maryland limited partnership ("SELLER"), to ALEXANDRIA REAL ESTATE EQUITIES,
INC., a Maryland corporation ("BUYER").

                                   R E C I T A L S

    WHEREAS, Seller is the owner of that certain real property located in the
County of Montgomery, State of Maryland (the "REAL PROPERTY"), as more
particularly described on Exhibit "A" attached hereto and incorporated herein by
reference;

    WHEREAS, Buyer and Seller have entered into that certain Purchase and Sale
Agreement (the "PURCHASE AGREEMENT"), dated as of ___________, 1997, with
respect to, among other things, the acquisition of the "Personal Property" and
the "Intangible Property" (each as defined below), and certain other property;
and

    WHEREAS, the Purchase Agreement requires Seller to convey all of Seller's
right, title and interest in, to and under the Personal Property and the
Intangible Property to Buyer.

    NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Seller hereby agrees as follows:

                                  A G R E E M E N T

    1.   Unless the context otherwise requires, all capitalized terms used but
not otherwise defined herein shall have the respective meanings provided
therefor in the Purchase Agreement.

    2.   Seller does hereby unconditionally, absolutely, and irrevocably grant,
bargain, sell, transfer, assign convey, set over and deliver unto Buyer all of
Seller's right, title and interest in and to:

         a.   all tangible personal property now or hereafter owned by Seller
and located on or about the Land or Improvements or attached thereto or used in
connection with the use, operation, maintenance or repair thereof (collectively,
the "PERSONAL PROPERTY"); and

         b.   all intangible property now or hereafter owned by Seller and used
in connection with the Land, the Improvements or the Personal Property, or any
business or businesses conducted thereon or with the use thereof, including,
without limitation, the Service



Contracts, building and trademarks and trade names, transferable business 
licenses, permits, applications, authorizations and other entitlements, 
transferable guarantees and warranties covering the Land and/or Improvements, 
all contract rights, books, records, reports, test results, environmental 
assessments, and other similar documents and materials relating to the use or 
operation, maintenance or repair of the Property or the construction or 
fabrication thereof, and all transferable utility contracts (collectively, 
the "INTANGIBLE PROPERTY" and, together with the Personal Property, the 
"PROPERTY").

    3.   Buyer hereby expressly assumes, for itself and its successors, assigns
and legal representatives, the Service Contracts and all of the obligations and
liabilities, fixed and contingent, of Seller thereunder accruing from and after
the date hereof with respect thereto and agrees to (a) be fully bound by all of
the terms, covenants, agreements, provisions, conditions, obligations and
liability of Seller thereunder, which accrue from the date hereof, and (b) keep,
perform and observe all of the covenants and conditions contained therein on the
part of Seller to be kept, performed and observed, from and after the date
hereof.

    4.   Seller represents and warrants that its title to the Property is free
and clear of all liens, mortgages, pledges, security interests, prior
assignments, encumbrances and claims of any nature other than the Permitted
Exceptions.

    5.   Seller hereby agrees to indemnify, protect, defend and hold Buyer
harmless from and against any and all claims, losses, damages, costs and
expenses (including, without limitation, reasonable attorney's fees and
disbursements) incurred or suffered by Buyer in connection with the Property and
arising prior to the Closing.  Buyer hereby agrees to indemnify, protect, defend
and hold Seller harmless from and against any and all claims, losses, damages,
costs and expenses (including, without limitation, reasonable attorney's fees
and disbursements) incurred or suffered by Seller in connection with the
Property and arising on or after the Closing.

    6.   This Bill of Sale shall be binding upon and inure to the benefit of
the parties hereto and their respective heirs, legal representatives, successors
and assigns.

    7.   This Bill of Sale and the legal relations of the parties hereto shall
be governed by and construed and enforced in accordance with the laws of the
State of Maryland, without regard to its principles of conflicts of law.



    IN WITNESS WHEREOF, this Bill of Sale was made and executed as of the date
first above written.

                             SELLER:

                             QUINCE ORCHARD ROAD LIMITED PARTNERSHIP II, a
                             Maryland limited partnership

                             By:  DWT Venture, Incorporated,
                                  a Maryland corporation
                             Its: General Partner


                             By:
                                  ---------------------------------
                                    Name:
                                Its:




                                     EXHIBIT "G"
                               [INTENTIONALLY OMITTED]

                                          6



                                     EXHIBIT "H"

                                 NONFOREIGN AFFIDAVIT
                                           
         1.   Section 1445 of the Internal Revenue Code of 1986, as amended
(the "IRC") provides that a transferee of a United States real property interest
must withhold tax if the transferor is a foreign person.

         2.   In order to inform ALEXANDRIA REAL ESTATE EQUITIES, INC., a
Maryland corporation (the "TRANSFEREE") that withholding of tax is not required
upon the disposition by QUINCE ORCHARD ROAD LIMITED PARTNERSHIP II, a Maryland
limited partnership (the "TRANSFEROR") of the United States real property more
particularly described on Exhibit "A" attached hereto and incorporated herein by
reference (the "PROPERTY"), the undersigned Transferor certifies and declares by
means of this certification, the following:

         3.   The Transferor is not a foreign person, foreign corporation,
foreign partnership, foreign trust or foreign estate (as such terms are defined
in the IRC and the Income Tax Regulations).

         4.   Transferor's federal taxpayer identification number is
___________.

         5.   Transferor's address is:

              __________
              __________
              __________

         6.   Transferor understands that this certification may be disclosed
to the Internal Revenue Service by Transferee and that any false statement
contained in this certification may be punished by fine, imprisonment or both.

                                       1


         Under penalties of perjury, Transferor declares that it has carefully
examined this certification and it is true, correct and complete.

         Executed this ____th day of ___________________, 199_    at   
____________, Maryland.

                        QUINCE ORCHARD ROAD LIMITED PARTNERSHIP II, a Maryland
                        limited partnership

                             By:  DWT Venture, Incorporated,
                                  a Maryland corporation
                             Its: General Partner


                                  By:____________________________________
                                     
                                         Name:
                                         Its: 

                                       2

                                     EXHIBIT "I"
                                           
                                 BUYER'S CERTIFICATE

The undersigned hereby certifies as follows:

    1.  All conditions to Buyer's obligations to proceed to Closing which were
to be satisfied or performed by QUINCE ORCHARD ROAD LIMITED PARTNERSHIP II, a
Maryland limited partnership ("SELLER"), as provided in that certain Purchase
and Sale Agreement (the "PURCHASE AGREEMENT") entered into between ALEXANDRIA
REAL ESTATE EQUITIES, INC., a Maryland corporation, ("BUYER") and Seller, dated
as of __________, 1997 have either been satisfied or waived.

    2.  All representations, covenants, and warranties made in or pursuant to
the Purchase Agreement by Buyer are true, accurate, correct and complete in all
material respects as of the date of this certificate.

    3.  Seller is entitled to rely on this certificate in connection with the
Closing (as defined in the Purchase Agreement).

    Buyer has executed this certificate effective as of____________, 1997.

                             BUYER

                             ALEXANDRIA REAL ESTATE EQUITIES, INC., 
                             a Maryland corporation



                             By:  _________________________________
                                    Name:
                                    Its:


                                     EXHIBIT "J"
                               [INTENTIONALLY OMITTED]


                                     EXHIBIT "K"
                                           
                                  SERVICE CONTRACTS
                                           


                                     EXHIBIT "L"
                                           
                               [INTENTIONALLY OMITTED] 
                                           


                                     EXHIBIT "M"
                                           
                                      LITIGATION
                                           
                                        NONE.