EOG8ZSCHX GO:0004222 52/114 metalloendopeptidase activity molecular_function "Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a mechanism in which water acts as a nucleophile, one or two metal ions hold the water molecule in place, and charged amino acid side chains are ligands for the metal ions." [GOC:mah, http://merops.sanger.ac.uk/about/glossary.htm#CATTYPE, http://merops.sanger.ac.uk/about/glossary.htm#ENDOPEPTIDASE] EOG8ZSCHX GO:0016020 52/114 membrane cellular_component "A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it." [GOC:dos, GOC:mah, ISBN:0815316194] EOG8ZSCHX GO:0007283 2/114 spermatogenesis biological_process "The process of formation of spermatozoa, including spermatocytogenesis and spermiogenesis." [GOC:jid, ISBN:9780878933846]