Granzyme B is a serine protease that induces apoptosis. It is involved with processing of cytokines and degradation of extracellular matrix proteins in chronic inflammation and wound healing. The preprotein is secreted by natural killer cells and cytotoxic T lymphocytes, then proteolytically processed to form the active protease.
www.genecards.org/cgi-bin/carddisp.pl?gene=GZMB