Subject: Stocks Ease as Repligen and Anergen Plunge, but MedImmune Shares Soar 
Date: Published: 10/24/91 (32 lines)
Source:  Wall Street Journal.  Copyright Dow Jones & Co. Inc. 

    OTC Focus:
    Stocks Ease as Repligen and Anergen
    Plunge, but MedImmune Shares Soar
    ----
    By Dave Pettit
    Staff Reporter of the Wall Street Journal

    NEW YORK -- The over-the-counter market's orderly pullback
 yesterday masked the wild volatility of several issues.
    News developments sent the shares of individual companies
 flying in disparate directions.  Traders said investors were
 quick to join the momentum-both on the buy and sell side.

[48 lines irrelevant to AIDS removed.  --sysop]

    Repligen, which had soared over the past several sessions,
 including a 5 1/4-point jump Tuesday, fell yesterday after
 its disclosure that it will reacquire from Merck the rights
 to certain monoclonal antibodies being developed as an AIDS
 anti-infective.  Repligen said it is still in an AIDS vaccine
 development effort with Merck.
    MedImmune's gain came on its disclosure that it agreed
 with Merck to develop MedImmune's monoclonal antibodies in
 preventing the disease.

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