Immunoconjugate Anticancer Drugs
ImmunoGen's Tumor-Activated Prodrug (TAP) Technology

An immunoconjugate anticancer drug
consists of a tumor-targeting monoclonal
antibody – a manufactured protein created
to bind specifically to a target found on
cancer cells – with an attached cell-killing,
or cytotoxic, agent. The antibody component
enables the immunoconjugate to bind
specifically to the cancer cells that have its
target on their surface and the cytotoxic
agent serves to kill the cancer cells.

TAP compounds are designed to travel through a patient’s bloodstream to reach the target cancer cells wherever they occur.

2005 Annual Report
Our Technology
Achievements: Past 12 Months
Letter To Shareholders
Operations

2005 Annual Report
Our Technology
Achievements: Past 12 Months
Letter To Shareholders
Operations
Corporate Information
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