Definition: A family of trypsin-like SERINE ENDOPEPTIDASES that are expressed in a variety of cell types including human prostate epithelial cells. They are formed from tissue prokallikrein by action with TRYPSIN. They are highly similar to PROSTATE-SPECIFIC ANTIGEN. EC 18.104.22.168.
do not confuse PROSTATE SPECIFIC KALLIKREIN with PROSTATE SPECIFIC ANTIGEN