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  • Title: Proteolytic specificity of chicken cathepsin L on bovine beta-casein.
    Author: Dufour E, Ribadeau-Dumas B.
    Journal: Biosci Rep; 1988 Apr; 8(2):185-91. PubMed ID: 3408813.
    Abstract:
    The proteolytic specificity of chicken cathepsin L was studied using bovine beta-casein as substrate. The peptide mixtures obtained after various times of hydrolysis were separated by RP-HPLC and ten peptides were identified. Chicken cathepsin L accepts proline residues in all positions except P'1. Looking at the amino acid residues on the amino side of the scissile bond we found three times the Tyr-Pro pair at P'1-P'2 positions and that the S'1 subsite can interact with modified amino acids such as phosphoserine.
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