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  • Title: Carboxypeptidase inhibitors from Ascaris suum: the primary structure.
    Author: Homandberg GA, Litwiller RD, Peanasky RJ.
    Journal: Arch Biochem Biophys; 1989 Apr; 270(1):153-61. PubMed ID: 2648995.
    Abstract:
    The carboxypeptidase A inhibitor from Ascaris suum was isolated from aqueous extracts by affinity chromatography toward immobilized carboxypeptidase A. The amino acid sequence is DQVRKCLSDT10DCTNGEKCVQ20KNKICSTIVE30IQRCEKEHFT40IPCKSNNDCQ50VWAHEKICN K60LPWGL65 . The carboxypeptidase A inhibitor is not homologous with the chymotrypsin/elastase or trypsin inhibitors from Ascaris, but shows homology in a 9-residue internal sequence with the 37/39-residue carboxypeptidase inhibitors from tomato and potato. The carboxy-terminal 5 (4) residues in the three inhibitors are similar, suggesting a common mechanism of inhibition.
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