... -4 ISO,GMP certificate USP/BP standard Good price&quality Fast delievery time High quality papain enzyme,CAS:9001-73-4Produced under GMP ... carbonyl carbon of a peptide backbone. This frees the amino terminal of the peptide, and forms a covalent acyl-enzyme intermediate ... then deacylated by a water molecule, and releases the carboxy terminal portion of the peptide. In immunology, papain is known to ...