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  • Title: Purification and amino acid sequence of chicken liver cathepsin L.
    Author: Dufour E, Obled A, Valin C, Béchet D, Ribadeau-Dumas B, Huet JC.
    Journal: Biochemistry; 1987 Sep 08; 26(18):5689-95. PubMed ID: 3676277.
    Abstract:
    Cathepsin L was purified from chicken liver lysosomes by a two-step procedure. Cathepsin L exhibited a single band of Mr 27,000 by sodium dodecyl sulfate-polyacrylamide gel electrophoresis under reducing conditions, presented a high affinity for the substrate Z-Phe-Arg-NMec, was very unstable at neutral pH, and was inhibited by Z-Phe-Phe-CHN2. The complete amino acid sequence of cathepsin L has been determined and consists of 215 residues. The sequence was deduced from analysis of peptides generated by enzymatic digestions and by chemical cleavage at methionyl bonds. Comparison of the amino acid sequence of cathepsin L with those of rat liver cathepsins B and H and papain demonstrates a striking homology among their primary structures.
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