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                                                                   Exhibit 10.50
                                                                   -------------

PAYMENTS ON THIS NOTE CANNOT BE MADE UNLESS PERMITTED BY SECTION 500 OF THE
CALIFORNIA CORPORATIONS CODE AND OTHER APPLICABLE LAWS AND CREDIT AGREEMENTS TO
WHICH THE MAKER IS A PARTY. AS OF THE DATE OF ISSUANCE OF THIS NOTE, THE MAKER
IS NOT IN COMPLIANCE WITH SECTION 500 OF THE CALIFORNIA CORPORATIONS CODE.

                          SUBORDINATED REDEMPTION NOTE
                              EXCESS CLASS B SHARES

$__________                   Commerce, California                ________, 2001

         Unified Western Grocers, Inc., a California corporation ("Maker"),
promises to pay to ____________________ ("Payee"), at the principal place of
business of the Payee as reflected on the records of the Maker, the principal
sum of $___________ in lawful money of the United States together with interest
at a rate of 6% per annum on the unpaid balance (all unpaid principal and
interest constituting the "Outstanding Obligation"), principal and interest
payable in 19 equal quarterly installments of $_____________, and the 20th
installment representing the remaining balance of unpaid principal and interest.
The payments hereunder shall be due and payable quarterly on the fifteenth day
of January, April, July and October of each year until the whole sum of
principal and interest has been paid in full. The first payment will be on the
regular payment date first following execution of this Note. This Note is given
pursuant to Article I, Section 11(b)(iii) of the Bylaws of the Maker and is
subject to restraints imposed by law and the Bylaws of the Maker. All sums paid
on this Note shall first be applied to interest, as accrued on the unpaid
principal at the time of such payment, and thereafter to principal. Interest
shall be calculated on the basis of a year of 365 days and charged for the
actual number of days elapsed.

         By accepting this Note Payee agrees to the following:

    1. Subordination of Outstanding Obligation. In consideration of financial
accommodation given, to be given or continued to be given to the Payee by Maker,
and in consideration of Maker's servicing of the Payee's account, and in
consideration of the providing of financing to Maker by the holders of Senior
Indebtedness as hereinafter defined, and in order to induce such financing, the
Outstanding Obligation shall be subordinate and subject in right of payment, to
the extent and in the manner hereinafter set forth, to the prior payment in full
of all Senior Indebtedness. "Senior Indebtedness" means all indebtedness,
liabilities or obligations of Maker, contingent or otherwise, whether existing
on the date of execution of this Subordination Agreement or thereafter incurred,
(A) in respect of borrowed money; (B) evidenced by bonds, notes, debentures or
other instruments of indebtedness; (C) evidenced by letters of credit, bankers'

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acceptances or similar credit instruments; (D) in respect of Capitalized Lease
Obligations; (E) in respect of the deferred purchase price of property or assets
(whether real, personal, tangible or intangible) or in respect of any mortgage,
security agreement, title retention agreement or conditional sale contract; (F)
in respect of any interest rate swap agreement, interest rate collar agreement
or other similar agreement or arrangement designed to provide interests rate
protection; (G) in respect of all indebtedness, liabilities or obligations of
others of any of the types referred to in clauses (A) through (F) for which
Maker is responsible or liable as obligor, guarantor or otherwise or in respect
of which recourse may be had against any of the property or assets (whether
real, personal, tangible or intangible) of Maker; and (H) in respect of all
modifications, renewals, extensions, replacements and refundings of any
indebtedness, liabilities or obligations of any of the types described in
clauses (A) through (G); provided, however, that the term "Senior Indebtedness"
shall not mean any indebtedness, liabilities or obligations of Maker, contingent
or otherwise, whether existing on the date of execution of this Subordination
Agreement or thereafter incurred, (i) to trade creditors arising or incurred in
the ordinary course of Maker's business (ii) in respect of any redemption,
repurchase or other payments on capital stock, (iii) in respect of Patrons'
Deposits, or (iv) in respect of Patronage Dividend Certificates.

         For purposes of the foregoing definition, "Capitalized Lease
Obligations" means the discounted present value of the rental obligations of any
person or entity under any lease of any property which, in accordance with
generally accepted accounting principles, has been recorded on the balance sheet
of such person or entity as a capitalized lease; "Patrons' Deposits" means the
deposits from time to time required to be made or maintained with Maker by its
patrons or customers in accordance with the Bylaws of Maker in effect from time
to time or in accordance with the policies for the servicing of accounts of
patrons or customers established from time to time by Maker, and any deposits
from time to time made or maintained with Maker by its patrons or customers in
excess of such required deposits; and "Patronage Dividend Certificates" means
any notes, revolving fund certificates, retain certificates, certificates of
indebtedness, patronage dividend certificates or any other written evidences of
indebtedness of Maker at any time outstanding which evidence the indebtedness of
Maker respecting the distribution by Maker of patronage dividends.

         The Outstanding Obligation shall be subordinate and junior in right of
payment to all Senior Indebtedness in the following respects:

         A. In the event of any insolvency or bankruptcy proceedings, and any
    receivership, liquidation, reorganization, arrangement or other similar
    proceedings in connection therewith, relative to Maker or to its creditors,
    as such, or to its property or assets (whether real, personal, tangible or
    intangible), or in the event of any proceedings for voluntary liquidation,

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    dissolution or other winding up of Maker, whether or not involving
    insolvency or bankruptcy, then the holders of Senior Indebtedness shall be
    entitled to receive payment in full of all Senior Indebtedness (whether
    accrued prior or subsequent to the commencement of such case or proceedings)
    before the Payee is entitled to receive any payment with respect to the
    Outstanding Obligation, and to that end (but subject to the power of a court
    of competent jurisdiction to make other equitable provision reflecting the
    rights conferred herein upon the Senior Indebtedness and the holders thereof
    with respect to the Outstanding Obligation and the Payee by a lawful plan of
    reorganization under applicable bankruptcy law) the holders of Senior
    Indebtedness shall be entitled to receive for application in payment thereof
    any payment or distribution of any kind or character, whether in cash or
    property or securities, or by set off or otherwise, which may be payable or
    deliverable in any such proceedings in respect of the Outstanding Obligation
    (other than securities which are subordinate and junior in right of payment,
    at least to the extent provided herein with respect to the Outstanding
    Obligation, to the payment of all Senior Indebtedness then outstanding) and
    the holders of Senior Indebtedness may demand, sue for, collect and receive
    any such payment or distribution and the receipt therefor, and file all such
    claims and take all such action, in the name of the Payee or otherwise, as
    such holders of Senior Indebtedness may determine to be necessary or
    appropriate for the enforcement of these subordination provisions, and the
    Payee will also execute and deliver such instruments confirming such
    authorizations and such powers of attorney, proofs of claim, assignments of
    claim, and other instruments as may be requested by such holders of Senior
    Indebtedness in order to enable such holders to enforce any and all claims
    upon or in respect of that portion of any Outstanding Obligation; and upon
    any such insolvency or bankruptcy proceedings, receivership, liquidation,
    reorganization, arrangement or other similar proceedings, or voluntary
    liquidation, dissolution or other winding up, any payment or distribution of
    assets of Maker of any kind or character, whether in cash, property or
    securities or by set off or otherwise (other than securities which are
    subordinate and junior in right of payment, at least to the extent provided
    herein with respect to the Outstanding Obligation, to the payment of all
    Senior Indebtedness then outstanding) to which the Payee would be entitled,
    except for the provisions hereof, shall be paid by Maker or by any receiver,
    trustee in bankruptcy, liquidating trustee, agent or other person making
    such payment or distribution directly to the holders of Senior Indebtedness
    (pro rata to each such holder on the basis of the respective amounts of
    Senior Indebtedness held by such holder) or their representatives, to the
    extent necessary to pay all Senior Indebtedness in full, after giving effect
    to any concurrent payment or distribution to or for the holders of Senior
    Indebtedness;

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         B. In the event that any default shall occur and be continuing with
    respect to the payment of Senior Indebtedness, unless payment in full shall
    have first been made on all Senior Indebtedness or such default with respect
    to such Senior Indebtedness shall have been cured or waived in accordance
    with the terms of such Senior Indebtedness, no payment shall be made with
    respect to the Outstanding Obligation (including any such payment which
    would cause such default); and

         C. In the event that any default (other than those referred to in
    paragraph B above) shall occur and be continuing with respect to any Senior
    Indebtedness permitting the holders of such Senior Indebtedness to
    accelerate the maturity thereof, unless payment in full shall have first
    been made on all Senior Indebtedness or such default with respect to such
    Senior Indebtedness shall have been cured or waived in accordance with the
    terms of such Senior Indebtedness, all payments with respect to the
    Outstanding Obligation (including any such payment which would cause such
    default) shall be suspended during any period:

              (1) of 180 days after the giving of written notice of such default
         by the holders of Senior Indebtedness to Maker; provided, that only one
         such notice shall be given pursuant to this clause (1) in any 12
         consecutive months; or

              (2) in which judicial proceedings shall be pending in respect of
         such default, a notice of acceleration of the maturity of such Senior
         Indebtedness shall have been transmitted to Maker in respect of such
         default and such judicial proceedings shall be diligently pursued in
         good faith.

         In the event that any payment or other distribution is made to or
received by the Payee in contravention of the provisions of paragraphs A, B
and/or C above, then such payment or other distribution shall be held by the
Payee for the benefit of, and shall be paid over and delivered to, the holders
of Senior Indebtedness (pro rata as their interests shall appear) or to their
representative or the trustee under the indenture or other agreement (if any)
pursuant to which Senior Indebtedness may have been issued, for application to
the payment of all Senior Indebtedness remaining unpaid to the extent necessary
to pay all Senior Indebtedness then due and payable in accordance with its
terms, after giving effect to any concurrent payment or distribution to or for
the holders of Senior Indebtedness.

    2.   Prepayment. Maker may, without premium or penalty, at any time and from
time to time, prepay all or any portion of the outstanding principal balance due

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under this Note. Any partial prepayments shall be applied to installments in
inverse order of their maturity.

    3.   Right of Set-Off. Maker shall have the right to withhold and set-off
against any amount due under this Note the amounts of any indebtedness that may
be owing the Maker or any of the Maker's subsidiaries by the Payee. Payee shall
have no right to set-off any amount due under this Note against any amount which
the Payee owes the Maker or any of the Maker's subsidiaries, and the Payee
hereby relinquishes any such right.

    4.   Severability. If any provision in this Note is held invalid or
unenforceable by any court of competent jurisdiction, the other provisions of
this Note will remain in full force and effect. Any provision of this Note held
invalid or unenforceable only in part or degree will remain in full force and
effect to the extent not held invalid or unenforceable.

    5.   Governing Law. This Note will be governed by the internal laws of the
State of California without regard to conflicts of laws principles.

    6.   Parties in Interest. This Note shall bind Maker and its successors and
assigns. This Note shall not be assigned or transferred by Payee without the
express prior written consent of Maker, except by will or by the laws of
succession if the Payee is an individual.

    7.   Section Headings, Construction. The headings of Sections in this Note
are provided for convenience only and will not affect its construction or
interpretation. All words used in this Note will be construed to be of such
gender or number as the circumstances require.

    8.   Non-Negotiability. This Note is not negotiable and shall not be
construed as an instrument governed by Division 3 of the California Uniform
Commercial Code.

                            [Signature Page follows]

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                  IN WITNESS WHEREOF, the Maker has caused this Note to be
executed by its duly authorized officers.

                                       Unified Western Grocers, Inc.,
                                       a California corporation

                                       By__________________________________
                                        Its _______________________________

                                       By__________________________________
                                        Its _______________________________

                                        6Common Stock Purchase Warrant

 EXHIBIT 4.5 
  
           THIS WARRANT AND THE STOCK ISSUABLE UPON THE EXERCISE HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), AND CAN BE TRANSFERRED
ONLY IN COMPLIANCE WITH THE ACT AND APPLICABLE STATE SECURITIES LAWS. THIS WARRANT AND SUCH SECURITIES MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT, UNLESS, IN THE OPINION OF COUNSEL FOR THE COMPANY
OR COUNSEL FOR THE REGISTERED HOLDER (WHICH SHALL BE IN FORM AND FROM SUCH COUNSEL AS SHALL BE REASONABLY SATISFACTORY TO THE COMPANY), SUCH REGISTRATION IS NOT THEN REQUIRED. 
  
 MOBILE P.E.T. SYSTEMS, INC. 
 COMMON STOCK PURCHASE WARRANT 
  
           1.    Issuance.    In consideration of good and valuable
consideration, the receipt of which is hereby acknowledged by Mobile P.E.T. Systems, Inc., a Delaware corporation (the “Company”), York, LLC, a Cayman Islands limited liability company, or registered assigns (the “Holder”) is
hereby granted the right to purchase at any time until 5:00 P.M., Pacific Coast time, on November 9, 2005 (the “Expiration Date”), Twenty Nine Thousand Eight Hundred and Fifty One (29,851) fully paid and nonassessable shares of the
Company’s Common Stock, no par value per share (the “Common Stock”) at an exercise price of $2.5125 per share (the “Exercise Price”) subject to further adjustment as set forth in Section 6 hereof. 
  
           2.    Exercise of Warrants.    This
Warrant is exercisable in whole or in part for whole shares of the Company’s Common Stock at the Exercise Price per share of Common Stock payable hereunder, payable in cash or by certified or official bank check. In lieu of paying cash to
exercise this Warrant, the Holder may, by designating a “cashless” exercise on the Notice of Exercise Form, acquire a number of whole shares of the Company’s Common Stock equal to (a) the difference between (i) the Market Value of the
Company’s Common Stock and (ii) the Exercise Price, multiplied by (b) the number of shares of Common Stock purchasable under the portion of the Warrant tendered to the Company, divided by (c) the Market Value of the Company’s Common Stock.
Upon surrender of this Warrant Certificate with the annexed Notice of Exercise Form duly executed, together with payment of the Exercise Price for the shares of Common Stock purchased, the Holder shall be entitled to receive a certificate or
certificates for the shares of Common Stock so purchased. For the purposes of this Section 2, “Market Value” shall be an amount equal to the average closing bid price of a share of Common Stock for the five (5) business days immediately
preceding the Company’s receipt of the Notice of Exercise Form duly executed. 
  
           3.    Reservation of Shares.    The Company hereby agrees that at all times during the term of this Warrant there shall be reserved
for issuance upon exercise of this Warrant such number of shares of its Common Stock as shall be required for issuance upon exercise of this Warrant (the “Warrant Shares”). 
  

          4.    Mutilation or Loss of Warrant.    Upon receipt by the Company of evidence
satisfactory to it of the loss, theft, destruction or mutilation of this Warrant, and (in the case of loss, theft or destruction) receipt of reasonably satisfactory indemnification, and (in the case of mutilation) upon surrender and cancellation of
this Warrant, the Company will execute and deliver a new Warrant of like tenor and date and any such lost, stolen, destroyed or mutilated Warrant shall thereupon become void. 
  
           5.    Rights of the Holder.    The Holder shall not, by virtue hereof, be entitled to any
rights of a stockholder in the Company, either at law or equity, and the rights of the Holder are limited to those expressed in this Warrant and are not enforceable against the Company except to the extent set forth herein. 
  
           6.    Adjustments to Exercise
Terms.    If the Company at any time prior to the full execution of this Warrant shall, by subdivision, combination, merger, spin-off, re-classification or like capital adjustment of the securities, change any of the
securities to which purchase rights under this Warrant exist into the same or different number
 

   

 
of securities of any class or classes, this Warrant shall thereafter entitle the Holder to acquire such number and kind of securities as would have been issuable as a result of such change with
respect to the securities acquirable immediately prior to such transaction. If shares of the securities acquirable upon exercise of this Warrant are subdivided into a greater number of securities, including any stock dividend, or if such securities
are combined into a lesser number of securities, then the purchase price for the securities acquirable upon exercise of this Warrant and the securities acquirable pursuant to this Warrant shall be proportionately and equitably adjusted.

  
           7.    Transfer to Comply with the
Securities Act; Registration Rights.     
  
           (a)  This Warrant has not been registered under the Securities Act of 1933, as amended, (the “Act”) and has been issued to the Holder for investment and not
with a view to the distribution of either the Warrant or the Warrant Shares. Neither this Warrant nor any of the Warrant Shares or any other security issued or issuable upon exercise of this Warrant may be sold, transferred, pledged or hypothecated
in the absence of an effective registration statement under the Act and applicable state securities laws relating to such security, unless in the opinion of counsel satisfactory to the Company, such registrations are not required under the Act. Each
certificate for the Warrant, the Warrant Shares and any other security issued or issuable upon exercise of this Warrant shall contain a legend on the face thereof, in form and substance satisfactory to counsel for the Company, setting forth the
restrictions on transfer contained in this Section. 
  
           (b)  The Company agrees to file a registration statement, which shall include the Warrant Shares, on Form SB-2 or another available form (the “Registration
Statement”) pursuant to the Act, pursuant to a Registration Rights Agreement between the Company and Holder dated as of the date hereof (the “Registration Rights Agreement”). 
  
           8.    Notice.    Any notice or other communication
required or permitted hereunder shall be in writing and shall be delivered personally, telegraphed, telexed, sent by facsimile transmission or sent by certified, registered or express mail, postage pre-paid. Any such notice shall be deemed given
when so delivered personally, telegraphed, telexed or sent by facsimile transmission, or, if mailed, two days after the date of deposit in the United States mails, as follows: 
  

	 	          (i)  if to the Company, to: 
 

  
  

	 	Mobile P.E.T. Systems, Inc. 
 

	 	2240 Shelter Island Drive 
 

	 	San Diego, CA 92106 
 

	 	ATTN: CEO 
 

	 	Telephone No.: (619) 226-6738 
 

	 	Telecopier No.: (619) 226-6889 
 

  

	 	          (ii)  if to the Holder, to: 
 

  

	 	c/o Thomson Kernaghan & Co. 
 

	 	365 Bay Street, Suite 1000, 10th
Fl. 
 

	 	Toronto, Ontario M5H 2V2 
 

	 	Telephone No.: (416) 860-4160 
 

	 	Telecopier No.: (416) 860-8313 
 

  
 Any party may be notice giver in accordance with this Section to the other parties designate another address or person for receipt of notices hereunder. 
  
           9.    Supplements and Amendments; Whole Agreement.    This Warrant may be amended or
supplemented only by an instrument in writing signed by the parties hereto. This Warrant contains the full understanding of the parties hereto with respect to the subject matter hereof and thereof and there are no representations, warranties,
agreements or understandings other than expressly contained herein and therein. 

   

  
           10.    Governing Law.    This Warrant shall be deemed to be a contract made under the laws of the State of California and for all
purposes shall be governed by and construed in accordance with the laws of such State applicable to contracts to be made and performed entirely within such State. 
  
           11.    Descriptive Headings.    Descriptive headings of the several Sections of this
Warrant are inserted for convenience only and shall not control or affect the meaning or construction of any of the provisions hereon. 

   

  
           IN WITNESS WHEREOF, the parties
hereto have executed this Warrant as to the 9th day of November, 2000. 
  

	 	Mo
	bile P.E.T. Systems, Inc., a Delaware corporation 
 

  

	 	/s/    PAUL CROWE         
 

	 	By
	:                                      
                                        
                   
 

	 	Na
	me: Paul Crowe 
 

	 	Tit
	le: CEO 
 

  

	Att
	est: 
 

  

	
	/s/    THOMAS G. BROWN         
 

	                                      
                                        
                              
	 
 

	Na
	me: Thomas G. Brown 
 

	Tit
	le: CFO

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