title: Mammalian sperm proacrosin-acrosin system.
mesh_terms: D000176:Acrosin / Q000378:metabolism*; D000818:Animals; D010450:Endopeptidases / Q000378:metabolism*; D004792:Enzyme Precursors / Q000378:metabolism*; D008297:Male; D013077:Sperm Head / Q000201:enzymology*; D013094:Spermatozoa / Q000201:enzymology*
chemical_list: D004792:Enzyme Precursors; D010450:Endopeptidases; D000176:Acrosin