Serine esterases that represent most of the granule content of T cytotoxic cells. It is not known if these enzymes are required for killing by the T cytotoxic cell. ... Origin: Granule + -zyme ... (05 Mar 2000) ... 
Type: Term Pronunciation: gran′zīmz Definitions: 1. Proteases with serine esterase activities that represent most of the granule content of T cytotoxic cells.
proteases released from a natural killer cell that enter the cytoplasm of a target cell, inducing apoptosis