Carboxypeptidase N (CPN1) protects the body from potent vasoactive and inflammatory peptides containing C-terminal Arg or Lys,such as kinins or anaphylatoxins, which are released into the circulatory system.The synthetic peptide used to raise the antibody Cat. No. 200207 is selected from a sequence within the N-term region of Carboxypeptidase N. For blocking experiments, a 10 to 100 fold molar excess to antibody is recommended.