Exhibit 10.9.2

                                   PROMISSORY NOTE

$700,000.00                                                 Pine Bluff, Arkansas
                                                                   June 27, 1997

    For Value Received, the undersigned promise to pay to the order of Simmons
First National Bank, 501 Main Street, Pine Bluff, Arkansas, 71601, or at such
other address as the holder hereof may from time to time designate, the sum of
$700,000.00 bearing interest at the rate of ten percent (10%) per annum, to be
payable in thirteen (13) monthly installments of principal plus accrued interest
beginning on July 1, 1997, the first twelve (12) of which shall be in the amount
of $9,250.55 each, with the outstanding principal balance plus accrued interest
becoming due with the 13th and final installment.  All installments shall be
applied first against accrued interest through the date of payment and the
balance of such installment shall be applied to reduce the outstanding principal
balance hereunder.

    If any payment due hereunder is received ten (10) or more days after the
due date of such payment, the undersigned agrees to pay a late fee equal to the
lesser of $25.00 or 10% of the late payment.  The maker herein, at his option,
may prepay the whole or any part of this note and on the part so paid the
running of interest shall stop at the date of such payment.

    This note is secured by a Mortgage on certain real property in Jefferson
County, Arkansas, as more particularly described therein and a security
agreement on certain personal property, both of even date herewith, is
guaranteed by Genzyme Transgenics Corporation and TSI Corporation and is subject
to the terms of a Loan Agreement of even date herewith.  If there shall be a
default in the payment of the indebtedness as aforesaid, or a default in the
provisions of the Mortgage or Security Agreement securing this note, the entire
unpaid indebtedness then due hereunder shall, at the option of the holder of
this note, become immediately due and payable without notice.

    This note shall be governed by the terms of Article 3 of the Uniform
Commercial Code in effect in the State of Arkansas (A.C.A. Section 4-3-1 et
seq.), regardless of whether this instrument constitutes a negotiable instrument
thereunder.

    The maker and endorser, if any, of this note hereby severally waive
presentment for payment, notice of nonpayment and protest and consent that the
time for payment of the above indebtedness or of any installment thereof may be
extended without notice and further, agree to pay a reasonable attorney's fee if
this note is placed in the hands of an attorney for collection.


                             TSI REDFIELD LABORATORIES, INC.


                             By  /s/ John B. Green      
                                 ------------------------------           
                                     John B. Green, Treasurer