Form Type:  8-K
Filing Date:  6/7/2013 
CIK:  0000855654 
Address:  830 WINTER ST 
City, State, Zip:  WALTHAM, Massachusetts 02451 
Telephone:  (781)895-0600 
Fiscal Year:  06/30 
Last Trade
Last Trade: 
-0.11 (-0.79%)  
Trade Time: 
Apr 24  
Market Cap: 
Description of Business
We develop novel, targeted therapeutics for the treatment of cancer using our expertise in cancer biology, monoclonal antibodies, highly potent cytotoxic, or cell-killing, agents, and the design of linkers that enable these agents to be stably attached to the antibodies while in the blood stream and released in their fully active form after delivery to a cancer cell. An anticancer compound made using our Targeted Antibody Payload, or TAP, technology consists of a monoclonal antibody that binds specifically to an antigen target found on cancer cells with multiple copies of one of our proprietary cell-killing agents attached using one of our engineered linkers. Its antibody component enables a TAP compound to bind specifically to cancer cells that express a particular target antigen, the highly potent cytotoxic agent serves to kill the cancer cell, and the engineered linker controls the release and activation of the cytotoxic agent inside the cancer cell.
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  FORM 8-K
      ITEM 8.01 - OTHER EVENTS