Document:

EXHIBIT
10.12

     

    GlenRose
Instruments Inc.

     

    RESTRICTED STOCK PURCHASE
AGREEMENT

    

    This Agreement is made on
________________ by and between GlenRose Instruments Inc., a Delaware
corporation having its principal place of business at 45 First Avenue, Waltham,
Massachusetts 02451 (the “Company”), and _________________, an individual having
an address at ___________________________ (the “Purchaser”).

    

     The Company desires to sell, and
the Purchaser desires to purchase _____________ shares of the Common Stock of
the Company (the “Shares”). The Shares are subject to repurchase by the Company
if the Purchaser ceases to be an employee of, or consultant, or director to the
Company or any parent, subsidiary or affiliate of the Company for any
reason.

    

    NOW THEREFORE, in consideration of the
covenants and agreements set forth herein and for other good and valuable
consideration, the receipt and sufficiency of which are hereby mutually
acknowledged, the parties hereto covenant and agree as follows:

    

    1.           Definitions. For the
purposes of this Agreement, the following terms shall have the following
respective meanings.

     

    “Act” shall mean the
Securities Act of 1933, as amended from time to time, and the rules and
regulations thereunder.

    

    “Change in Control”
shall mean (a) the acquisition in a transaction or series of transactions by any
person (such term to include anyone deemed a person under Section 13(d)(3) under
the Exchange Act), other than the Company or any of its subsidiaries, or any
employee benefit plan or related trust of the Company or any of its
subsidiaries, of beneficial ownership (within the meaning of Rule 13d-3
promulgated under the Exchange Act) of fifty percent (50%) or more of the
combined voting power of the then outstanding voting securities of the Company
entitled to vote generally in the election of directors; provided a Change in
Control shall not occur solely as the result of an Initial Listing or (b) the
sale or other disposition of all or substantially all of the assets of the
Company in one transaction or series of related transactions.

    

    “Common Stock” shall
mean the shares of Common Stock, par value $0.01 per share, of the
Company.

    

    “Company” shall have
the meaning set forth in the preamble to this Agreement.

    

    “Exchange Act” shall
mean the Securities Exchange Act of 1934, as amended from time to time, and the
rules and regulations thereunder.

    

    “Purchaser” shall have
the meaning set forth in the preamble to this Agreement.

    

    “Initial Listing”
shall mean the registration of the Company pursuant to Section 12(b) or (g) of
the Exchange Act together with the registration of the Shares under the Act and
the listing of the Shares for trading on Nasdaq, the Over-the-Counter Bulletin
Board, or on any securities exchange.

    

    “Permitted Transferee”
shall mean any of the following to whom the Purchaser may subsequently transfer
Restricted Shares hereunder: the Purchaser’s spouse, children (natural or
adopted), stepchildren, or a trust, partnership or other entity for the sole
benefit of any of such persons of which the Purchaser is the settlor or the
contributing partner or member or any other affiliate of the
Purchaser.

    

    “Repurchase” shall
have the meaning set forth in Section 6 of this Agreement.

    

    “Restricted Shares”
shall initially mean all of the Shares that are not Vested Shares.

    

    “Shares” shall have
the meaning set forth in the preamble to this Agreement.

    

    “Termination Event”
shall mean the termination of the Purchaser’s status as an employee of, or
consultant, or director to the Company or any parent, subsidiary or affiliate of
the Company for any reason.

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    

    “Vested Shares” shall
mean 25% of the Shares on the first anniversary of the grant date, and then an
additional 25% on each of the subsequent three anniversaries, provided that none
of the shares will vest until 90 days after the Company’s Initial Listing. All
of the Shares shall become Vested Shares upon a Change in Control prior to a
Termination Event.

    

    2.           Purchase and Sale of the
Shares. The Company hereby sells the Shares to the Purchaser, and the
Purchaser hereby purchases the Shares from the Company, for a purchase price of
$0.01 per share or an aggregate purchase price of _______________ Dollars
($_______) (the “Purchase Price”). The Company hereby acknowledges receipt of
the Purchase Price from the Purchaser. The parties agree to execute and deliver
such further documents as may be necessary to give effect to the purchase and
sale of the Shares.

    

    3.           Representations by the
Company. The Company hereby represents and warrants to the Purchaser that
it has the corporate power and authority to sell the Shares to the Purchaser.
Except as set forth in the preceding sentence, the Company makes no
representation or warranty to the Purchaser with respect to either the Shares or
the Company.

    

    4.           Representations by the
Purchaser. The
Purchaser hereby represents and warrants to the Company as follows:

    

    (a)           The
Purchaser is acquiring the Shares for his or her own account as principal, for
investment purposes only, and not with a view to, or for, resale or distribution
of all or any part of the Shares, and no other person has a direct or indirect
beneficial interest in such Shares.

    

    (b)           The
Purchaser acknowledges his or her understanding that the sale of the Shares is
intended to be exempt from registration under the Act, and, in furtherance
thereof, the Purchaser represents and warrants to and agrees with the Company
that the Purchaser has the financial ability to bear the economic risk of his or
her investment in the Shares, has adequate means for providing for his or her
current needs and contingencies and has no need for liquidity with respect to
his or her investment in the Shares.

    

    (c)           The
Purchaser is an “accredited investor” as defined in the Act.

    

    5.           Acknowledgments by the
Purchaser. The Purchaser acknowledges that:

    

    (a)           No
federal or state agency has passed upon the Shares or made any finding or
determination as to the fairness of this investment.

    

    (b)           There
is no established market for the Shares and no assurance has been given that any
public market for them will develop.

    

    (c)           The
Shares may not be sold, pledged or otherwise transferred, except as may be
permitted under the Act and applicable state securities laws pursuant to
registration or exemption therefrom; and accordingly, the Purchaser may be
required to bear the financial risks of an investment in the Shares for an
indefinite period of time.

    

    6.           Repurchase of Restricted
Shares.

    

    (a)           Repurchase. Upon the
occurrence of a Termination Event, the Company shall repurchase and the
Purchaser shall resell to the Company (the “Repurchase”) all of
the Restricted Shares (that is, Shares that are not then Vested Shares) held by
the Purchaser as of the date of such Termination Event at the purchase price of
$0.01 per share. The Company shall have the option to not purchase all or any
portion of the Restricted Shares by written notice to the
Purchaser.

    

    (b)           Closing Procedure.
The closing of the Repurchase shall be deemed to occur at the close of business
on the date of the Termination Event regardless of when or whether the Purchaser
makes the deliveries required by this subparagraph. The Company is hereby
appointed as the attorney-in-fact of the Purchaser to effect the transfer to the
Company of the Restricted Shares being repurchased. Promptly after the
Termination Event, the Purchaser shall promptly surrender to the Company any
certificates representing the Restricted Shares that were purchased, together
with a duly executed stock power for the transfer of such Restricted Shares to
the Company.  Upon the Company’s receipt of the certificates from the
Purchaser, the Company shall mail to the Purchaser a check for the purchase
price of the Restricted Shares being purchased. The Repurchase right specified
herein shall survive and remain in effect as to Restricted Shares following and
notwithstanding any public offering by the Company and certificates representing
such Restricted Shares shall bear legends to such effect.

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    

    (c)           Remedy. Without
limitation of any other provision of this Agreement or other rights, in the
event that the Purchaser is required to sell the Restricted Shares pursuant to
the provisions of this Section 6 and in the further event that he refuses or for
any reason fails to deliver to the Company the certificate or certificates
evidencing such Restricted Shares together with a related stock power, the
Company may deposit the purchase price for such Restricted Shares with a bank
designated by the Company, or with the Company’s independent public accounting
firm, as agent or trustee, or in escrow, for the Purchaser,  to be
held by such bank or accounting firm for the benefit of and for delivery to the
Purchaser promptly after the Purchaser makes the required deliveries
hereunder.

    

    7.           Restrictions on Transfer of
Shares. None of the Shares shall be sold, assigned, transferred, pledged,
hypothecated, given away or in any other manner disposed of or encumbered,
whether voluntarily or by operation of law, unless such transfer is in
compliance with all applicable federal and state securities laws and such
disposition is in accordance with the terms and conditions of this Section 7. In
connection with any transfer of Shares, the Company may require the transferor
to provide at the transferor’s own expense an opinion of counsel to the
transferor, satisfactory to the Company that such transfer is in compliance with
all foreign, federal and state securities laws. Any attempted disposition of
Shares not in accordance with the terms and conditions of this Section 7 shall
be null and void, and the Company shall not reflect on its records any change in
record ownership of any Shares as a result of any such disposition, shall
otherwise refuse to recognize any such disposition and shall not in any way give
effect to any such disposition of any Shares. Subject to the foregoing general
provisions, the Purchaser may sell, assign, transfer or give away any or all of
the Shares that are not Restricted Shares only to Permitted Transferees; provided, however, that such
Permitted Transferee(s) shall, as a condition to any such transfer, agree to be
subject to the provisions of this Agreement (including, without limitation, the
provisions of Section 6 and this Section 7) and shall have delivered a written
acknowledgment to that effect to the Company.

    

    8.           Legend. Each
certificate(s) representing the Shares shall carry substantially the following
legend:

    “The
transferability of this certificate and the shares of stock represented hereby
are subject to the restrictions, terms and conditions (including repurchase and
restrictions against transfers) contained in a certain Restricted Stock Purchase
Agreement between the Company and the holder of this certificate (a copy of
which is available at the offices of the Company for examination).

    

    The
securities represented hereby have not been registered under the Securities Act
of 1933, as amended (the “Act”), or any state securities or “blue sky” laws and
may not be offered, sold, transferred, hypothecated or otherwise assigned except
(1) pursuant to a registration statement with respect to such securities which
is effective under the Act; or (2) pursuant to an available exemption from
registration under the Act relating to the disposition of securities; and (3) in
accordance with applicable state securities and “blue sky” laws.”

    

    9.           Miscellaneous
Provisions.

    

    (a)           Record Owner;
Dividends. The Purchaser and any Permitted Transferees, during the
duration of this Agreement, shall be considered the record owners of and shall
be entitled to vote the Shares. The Purchaser and any Permitted Transferees
shall be entitled to receive all dividends and any other distributions declared
on the Shares; provided, however, that the
Company is under no duty to declare any such dividends or to make any such
distribution.

    

    (b)           Equitable Relief. The
parties hereto agree and declare that legal remedies are inadequate to enforce
the provisions of this Agreement and that equitable relief, including specific
performance and injunctive relief, may be used to enforce the provisions of this
Agreement.

    

    (c)           Change and
Modifications. This Agreement may not be orally changed, modified or
terminated, nor shall any oral waiver of any of its terms be effective. This
Agreement may be changed, modified or terminated only by an agreement in writing
signed by the Company and the Purchaser.

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    (d)           Choice of Law.
Notwithstanding the place where this Agreement may be executed by any of the
parties hereto, all the terms and provisions hereof shall be construed in
accordance with and governed by the laws of the Commonwealth of Massachusetts,
excluding any conflicts or choice of law rule or principle that might otherwise
refer construction or interpretation of this agreement to the substantive law of
another jurisdiction. Any dispute which may arise out of or in connection with
this Agreement shall be adjudicated before a court located in Boston,
Massachusetts and the parties hereby submit to the exclusive jurisdiction of the
courts of the Commonwealth of Massachusetts located in Boston, Massachusetts and
of the federal courts in Boston, Massachusetts with respect to any action or
legal proceeding commenced by any party, and irrevocably waive any objection
they now or hereafter may have respecting the venue of any such action or
proceeding brought in such a court or respecting the fact that such court is an
inconvenient forum, relating to or arising out of this Agreement or any acts or
omissions relating to the sale and purchase of the Shares, and each of the
Company and the Purchaser (including any Permitted Transferees) consents to the
service of process in any such action or legal proceeding by means of registered
or certified mail, return receipt requested, or by means of a recognized
overnight air courier service in care of the address set forth below or such
other address as each party shall furnish in writing to the other. In the event
any such action is brought, whether at law or in equity, then the prevailing
party shall be paid his, her or its reasonable attorneys’ fees, expenses and
disbursements arising out of such action. The parties hereby waive trial by jury
in any action or proceeding involving, directly or indirectly, any matter
(whether sounding in tort, contract, fraud or otherwise) in any way arising out
of or in connection with this Agreement or the purchase of the
Shares.

     

    (e)           Headings. The
headings are intended only for convenience in finding the subject matter and do
not constitute part of the text of this Agreement and shall not be considered in
the interpretation of this Agreement.

    

    (f)           Saving Clause. If any
provision(s) of this Agreement shall be determined to be illegal or
unenforceable, such determination shall in no manner affect the legality or
enforceability of any other provision hereof.

    

    (g)           Notices. All notices,
requests, consents and other communications shall be in writing and be deemed
given when delivered personally, by facsimile transmission or by a recognized
overnight courier service or when received if mailed by first class registered
or certified mail, postage prepaid.  Notices to the Company or the
Purchaser shall be sent to the addresses first set forth above, or to such other
address or addresses as may have been furnished by such party in writing to the
other. Notices to any holder of the Shares other than the Purchaser shall be
addressed to the address furnished by such holder to the Company.

    

    (h)           Benefit and Binding
Effect. This Agreement shall be binding upon and shall inure to the
benefit of the parties hereto, their respective successors, assigns, and legal
representatives. Without limitation of the foregoing, upon any stock-for-stock
merger in which the Company is not the surviving entity, shares of the Company’s
successor issued in respect of the Shares shall remain subject to terms,
conditions and restrictions set forth herein. The Company has the right to
assign this Agreement, and such assignee shall become entitled to all the rights
of the Company hereunder to the extent of such assignment.

    

    (i)           Employment or
Consulting. This Agreement does not confer upon the Purchaser any rights
with respect to continuation of his or her employment or consulting relationship
with the Company, nor shall it interfere with any right of the Company to
terminate such employment or consulting relationship at any time.

    

    (j)           Counterparts. For the
convenience of the parties and to facilitate execution, this Agreement may be
executed in two or more counterparts, each of which shall be deemed an original,
but all of which shall constitute one and the same document.

    

    IN
WITNESS WHEREOF, the Company and the Purchaser have executed this Restricted
Stock Purchase Agreement as of the date first above written.

    

    GLENROSE
INSTRUMENTS INC.

    

    
      
        
          
            
              
                
                  	
                          By:

                        	
                           

                        	 
      	
                           

                        	 
	
                          Name:

                        	
                          John
      N. Hatsopoulos

                        	 
      	
                          Name:

                        	 
	
                          Title:

                        	
                          ChairmanEXHIBIT
10.13

     

    GlenRose
Instruments Inc.

     

    Stock Option Agreement
under

    2005 Stock Option and
Incentive Plan

    

    GlenRose Instruments Inc. (the “Company”) hereby
grants the following stock option pursuant to its 2005 Stock Option and
Incentive Plan. The terms and conditions attached hereto are also a part
hereof.

    

    
      
        
          
            
              
                
                  
                    
                      
                        
                          
                            
                              	
                                      Name
      of optionee (the “Optionee”):

                                       

                                    	 
      
	
                                      Date
      of this option grant:

                                       

                                    	 
      
	
                                      Number
      of shares of the Company’s Common Stock subject to this option (“Shares”):

                                    	 
      
	
                                      Option
      exercise price per share:

                                       

                                    	 
      
	
                                      Number,
      if any, of Shares that may be purchased on or after the grant
      date:

                                    	 
      
	
                                      Shares
      that are subject to vesting schedule:

                                       

                                    	 
      
	
                                      Vesting
      Start Date:

                                       

                                    	 
      
	Vesting
      Schedule:	 

                            

                          

                        

                      

                    

                  

                

              

            

          

        

      

    

     

    
      
        
          
            
              
                
                  
                    
                      	 
      	
                              ______
      shares

                            
	 
      	
                              ______
      shares

                            
	 
      	
                              ______
      shares

                            
	 
      	
                              ______
      shares

                            
	 
      	
                              ______
      shares

                            
	
                              All
      vesting is dependent on the continuation of a Business Relationship with
      the Company, as provided
herein.

                            

                    

                  

                

              

            

          

        

      

    

    

    This
option satisfies in full all commitments that the Company has to the Optionee
with respect to the issuance of stock, stock options or other equity
securities.

    

    GlenRose
Instruments Inc.

    

    
      
        
          
            	
                    By:

                  	
                     

                  	 
      	
                    By:

                  	
                     

                  
	
                    John
      N. Hatsopoulos

                  	 
      	 
      	 
      
	
                    Chairman

                  	 
      	 
      	 
      

          

        

      

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    Stock Option
Agreement

    2005 Stock Option and
Incentive Plan

    

    1.           Grant Under Plan.
This option is granted pursuant to and is governed by the Company’s 2005 Stock
Option and Incentive Plan (the “Plan”) and, unless
the context otherwise requires, terms used herein shall have the same meaning as
in the Plan.

    

    2.           Vesting of
Option.

    

     (a)           Vesting if Business
Relationship Continues. The Optionee may exercise this option on or after
the date of this option grant for the number of shares of Common Stock, if any,
set forth on the cover page hereof. If the Optionee has continuously maintained
a Business Relationship (as defined below) with the Company through the dates
listed on the vesting schedule set forth on the cover page hereof, the Optionee
may exercise this option for the additional number of shares of Common Stock set
opposite the applicable vesting date.  Notwithstanding the foregoing,
the Board may, in its discretion, accelerate the date that any installment of
this option becomes exercisable. The foregoing rights are cumulative and may be
exercised only before the date which is seven
years from the date of this option grant.

    

    (b)  Accelerated Vesting Due to
Acquisition. In the event an Acquisition that is not a Private
Transaction occurs while the Optionee maintains a Business Relationship with the
Company and this option has not fully vested, this option shall become
exercisable for 100% of the then number of Shares as to which it has not vested,
such vesting to occur immediately prior to the closing of the
Acquisition.

    

    (c)  Definitions. The
following definitions shall apply:

    

    “Acquisition” means
(i) the sale of the Company by merger in which the shareholders of the Company
in their capacity as such no longer own a majority of the outstanding equity
securities of the Company (or its successor); or (ii) any sale of all or
substantially all of the assets or capital stock of the Company (other than in a
spin-off or similar transaction) or (iii) any other acquisition of the business
of the Company, as determined by the Board.

    

    “Business
Relationship” means service to the Company or its successor in the
capacity of an employee, officer, director or consultant.

    

    “Private Transaction”
means any Acquisition where the consideration received or retained by the
holders of the then outstanding capital stock of the Company does not consist of
(i) cash or cash equivalent consideration, (ii) securities which are registered
under the Securities Act and/or (iii) securities for which the Company or any
other issuer thereof has agreed, including pursuant to a demand, to file a
registration statement within ninety (90) days of completion of the transaction
for resale to the public pursuant to the Securities Act.

     

    3.           Termination of Business
Relationship.

    

    (a)           Termination. If the
Optionee’s Business Relationship with the Company ceases, voluntarily or
involuntarily, with or without cause, no further installments of this option
shall become exercisable, and this option shall expire (may no longer be
exercised) after the passage of 30
days from the date of termination, but in no event later than the
scheduled expiration date. Any determination under this agreement as to the
status of a Business Relationship or other matters referred to above shall be
made in good faith by the Board of Directors of the Company.

    

    (b)           Employment Status.
For purposes hereof, with respect to employees of the Company, employment shall
not be considered as having terminated during any leave of absence if
such leave of absence has been approved in writing by the Company and if such
written approval contractually obligates the Company to continue the employment
of the Optionee after the approved period of absence; in the event of such an
approved leave of absence, vesting of this option shall be suspended (and the
period of the leave of absence shall be added to all vesting dates) unless
otherwise provided in the Company’s written approval of the leave of absence.
For purposes hereof, a termination of employment followed by another Business
Relationship shall be deemed a termination of the Business Relationship with all
vesting to cease unless the Company enters into a written agreement related to
such other Business Relationship in which it is specifically stated that there
is no termination of the Business Relationship under this agreement. This option
shall not be affected by any change of employment within or among the Company
and its Subsidiaries so long as the Optionee continuously remains an employee of
the Company or any Subsidiary.

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    

    4.           Death;
Disability.

    

    (a)           Death.  Upon
the death of the Optionee while the Optionee is maintaining a Business
Relationship with the Company, this option may be exercised, to the extent
otherwise exercisable on the date of the Optionee’s death, by the Optionee’s
estate, personal representative or beneficiary to whom this option has been
transferred pursuant to Section 10, only at any time within 12 months after
the date of death, but not later than the scheduled expiration
date.

    

    (b)           Disability.  If
the Optionee ceases to maintain a Business Relationship with the Company by
reason of his or her disability, this option may be exercised, to the extent
otherwise exercisable on the date of cessation of the Business Relationship,
only at any time within 12 months after such cessation of the Business
Relationship, but not later than the scheduled expiration date. For purposes
hereof, “disability” means
“permanent and total
disability” as defined in Section 22(e) (3) of the Code.

    

    5.           Partial
Exercise.  This option may be exercised in part at any time and
from time to time within the above limits, except that this option may not be
exercised for a fraction of a share.

    

    6.           Payment of Exercise
Price.

     

    (a) 
Payment Options.  The
exercise price shall be paid by one or any combination of the following forms of
payment that are applicable to this option, as indicated on the cover page
hereof: 

    
      
         

        	
                 
      

              	
                (i)

              	
                by
      check payable to the order of the Company;
or

              

      

    

    
      	
               
      

            	
              (ii)

            	
              provided
      that the Company’s common stock is then listed on a securities exchange,
      including Nasdaq, or on the Over-the-Counter Bulletin Board, by delivery
      of an irrevocable and unconditional undertaking, satisfactory in form and
      substance to the Company, by a creditworthy broker to deliver promptly to
      the Company sufficient funds to pay the exercise price, or delivery by the
      Optionee to the Company of a copy of irrevocable and unconditional
      instructions, satisfactory in form and substance to the Company, to a
      creditworthy broker to deliver promptly to the Company cash or a check
      sufficient to pay the exercise price;
or

            

    

    

    7.           Securities Laws Restrictions
on Resale. Until registered under the Securities Act of 1933, as amended,
or any successor statute (the “Securities Act”), the
Shares will be illiquid and will be deemed to be “restricted securities” for
purposes of the Securities Act.  Accordingly, such shares must be sold
in compliance with the registration requirements of the Securities Act or an
exemption therefrom and may need to be held indefinitely.  Unless the
Shares have been registered under the Securities Act, each certificate
evidencing any of the Shares shall bear a restrictive legend specified by the
Company.

    

    8.           Method of Exercising
Option.  Subject to the terms and conditions of this agreement,
this option may be exercised by written notice to the Company at its principal
executive office, or to such transfer agent as the Company shall
designate.  Such notice shall state the election to exercise this
option and the number of Shares for which it is being exercised and shall be
signed by the person or persons so exercising this option.  Such
notice shall be accompanied by payment of the full purchase price of such
shares, and the Company shall deliver a certificate or certificates representing
such shares as soon as practicable after the notice shall be
received.  Such certificate or certificates shall be registered in the
name of the person or persons so exercising this option (or, if this option
shall be exercised by the Optionee and if the Optionee shall so request in the
notice exercising this option, shall be registered in the name of the Optionee
and another person jointly, with right of survivorship). In the event this
option shall be exercised, pursuant to Section 5 hereof, by any person or
persons other than the Optionee, such notice shall be accompanied by appropriate
proof of the right of such person or persons to exercise this
option.

    

    9.           Option Not
Transferable.  This option is not transferable or assignable
except by will or by the laws of descent and distribution. During the Optionee’s
lifetime only the Optionee can exercise this option.

    

    10.         No Obligation to Exercise
Option.  The grant and acceptance of this option imposes no
obligation on the Optionee to exercise it.

    

    11.         No Obligation to Continue
Business Relationship.  Neither the Plan, this agreement, nor
the grant of this option imposes any obligation on the Company to continue the
Optionee in employment or other Business Relationship.

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    

    12.         Adjustments.  Except
as is expressly provided in the Plan with respect to certain changes in the
capitalization of the Company, no adjustment shall be made for dividends or
similar rights for which the record date is prior to such date of
exercise.

    

    13.         Withholding
Taxes.  If the Company in its discretion determines that it is
obligated to withhold any tax in connection with the exercise of this option, or
in connection with the transfer of, or the lapse of restrictions on, any Common
Stock or other property acquired pursuant to this option, the Optionee hereby
agrees that the Company may withhold from the Optionee’s wages or other
remuneration the appropriate amount of tax. At the discretion of the Company,
the amount required to be withheld may be withheld in cash from such wages or
other remuneration or in kind from the Common Stock or other property otherwise
deliverable to the Optionee on exercise of this option.  The Optionee
further agrees that, if the Company does not withhold an amount from the
Optionee’s wages or other remuneration sufficient to satisfy the withholding
obligation of the Company, the Optionee will make reimbursement on demand, in
cash, for the amount underwithheld.

    

    14.         Lock-up Agreement.
The Optionee agrees that in the event that the Company effects an initial
underwritten public offering of Common Stock registered under the Securities
Act, the Shares may not be sold, offered for sale or otherwise disposed of,
directly or indirectly, without the prior written consent of the managing
underwriter(s) of the offering, for such period of time after the execution of
an underwriting agreement in connection with such offering that all of the
Company’s then directors and executive officers agree to be similarly
bound.

    

    15.         Arbitration.  Any
dispute, controversy, or claim arising out of, in connection with, or relating
to the performance of this agreement or its termination shall be settled by
arbitration in Boston, Massachusetts, pursuant to the rules then obtaining of
the American Arbitration Association. Any award shall be final, binding and
conclusive upon the parties and a judgment rendered thereon may be entered in
any court having jurisdiction thereof.

    

    16.         Provision of Documentation
to Optionee.  By signing this agreement the Optionee
acknowledges receipt of a copy of this agreement and a copy of the
Plan.

    

    17.         Miscellaneous.

     

       (a)           Notices. All notices
hereunder shall be in writing and shall be deemed given when sent by mail, if to
the Optionee, to the address set forth below or at the address shown on the
records of the Company, and if to the Company, to the Company’s principal
executive offices, attention of the Corporate Secretary.

     

     
 (b)           Entire Agreement;
Modification. This agreement constitutes the entire agreement between the
parties relative to the subject matter hereof, and supersedes all proposals,
written or oral, and all other communications between the parties relating to
the subject matter of this agreement. This agreement may be modified, amended or
rescinded only by a written agreement executed by both parties.

    

      
(c)           Fractional Shares. If
this option becomes exercisable for a fraction of a share because of the
adjustment provisions contained in the Plan, such fraction shall be rounded
down.

    

      
(d)           Issuances of Securities;
Changes in Capital Structure. Except as expressly provided herein or in
the Plan, no issuance by the Company of shares of stock of any class, or
securities convertible into shares of stock of any class, shall affect, and no
adjustment by reason thereof shall be made with respect to, the number or price
of shares subject to this option. No adjustments need be made for dividends paid
in cash or in property other than securities of the Company. If there shall be
any change in the Common Stock of the Company through merger, consolidation,
reorganization, recapitalization, stock dividend, stock split, combination or
exchange of shares, spin-off, split-up or other similar change in capitalization
or event, the restrictions contained in this agreement shall apply with equal
force to additional and/or substitute securities, if any, received by the
Optionee in exchange for, or by virtue of his or her ownership of, Shares,
except as otherwise determined by the Board.

    

      
(e)           Severability. The
invalidity, illegality or unenforceability of any provision of this agreement
shall in no way affect the validity, legality or enforceability of any other
provision.

    
 

      
(f)           Successors and
Assigns. This agreement shall be binding upon and inure to the benefit of
the parties hereto and their respective successors and assigns, subject to the
limitations set forth in Section 10 hereof.

    

      
(g)           Governing Law. This
agreement shall be governed by and interpreted in accordance with the laws of
the State of Delaware, without giving effect to the principles of the conflicts
of laws thereof.

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