ImmunoGen has also engineered linkage technology that keeps the cancer-cell killing agent attached to the antibody until it reaches the cancer cell and then controls the release of the agent inside the cell. In addition to IMGN388, five other compounds that make use of ImmunoGen's TAP technology are in clinical testing. About ImmunoGen, Inc. ImmunoGen, Inc. develops targeted anticancer therapeutics using its expertise in cancer biology, monoclonal antibodies and the creation and attachment of potent cancer-cell killing agents. The Company's TAP technology uses antibodies to deliver one of ImmunoGen's highly potent cancer-cell killing agents specifically to tumors. In addition to the Company's product pipeline, compounds utilizing the TAP technology are in clinical testing through ImmunoGen's collaborations with Genentech (a wholly owned member of the Roche Group), sanofi-aventis, Biogen Idec and Biotest.