Comparative study on specificities of rat cathepsin L and papain: amino acid differences at substrate-binding sites are involved in their specificities.

Abstract excerpt

Sixty-nine rat cathepsin L-susceptible peptide bonds were analyzed employing various peptide substrates. The proteolytic specificities of rat cathepsin L and papain were compared and the results are discussed in relation to differences in amino acid residues around their binding sites. The specificity of cathepsin L, which is characterized by a remarkable preference for hydrophobic amino acids at the P2 site of...

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