1. a simple protein found in fish sperm; rich in arginine; simpler in composition than globulin or albumin; counteracts the anticoagulant effect of heparin;
WordNet (r) 3.0 (2006):
protamine
n 1: a simple protein found in fish sperm; rich in arginine;
simpler in composition than globulin or albumin;
counteracts the anticoagulant effect of heparin