ID 3.4.21.10 DE Acrosin. CA Preferential cleavage: Arg-|-Xaa, Lys-|-Xaa. CC -!- Inhibited by naturally occurring trypsin inhibitors. CC -!- Occurs in spermatozoa. CC -!- Belongs to peptidase family S1. PR PROSITE; PDOC00124; DR P10626, ACRO_CAPHI ; P10323, ACRO_HUMAN ; P23578, ACRO_MOUSE ; DR P08001, ACRO_PIG ; P48038, ACRO_RABIT ; P29293, ACRO_RAT ; DR Q9GL10, ACRO_SHEEP ; //