Carboxypeptidase B
Carboxypeptidase B is a carboxypeptidase that preferentially cleaves off basic amino acids arginine and lysine from the C-terminus of a peptide. This enzyme is secreted by the pancreas, and it travels to the small intestine, where it aids in protein digestion. Plasma carboxypeptidase B is responsible for converting the C5a protein into C5a des-Arg, with one less amino acid.