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. 2009 May;8(5):1029–1043. doi: 10.1074/mcp.M800223-MCP200

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Copyright © 2009, The American Society for Biochemistry and Molecular Biology

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Fig. 1. — Carboxyl-terminal P₁ residue cleavage specificity of porcine elastase based on MS/MS data of 6577 peptides. A, absolute percentage of occurred cleavages after the stated amino acid. B, relative percentage of cleavages considering amino acid distribution in the sequences of identified protein hits (totalling 648,423 residues). C, cleavage dependence of P₁ and P_1′ residues based on absolute number of occurred cleavages. D, relative frequency of P₁-P_1′ cleavages, based on amino acid distribution in the protein sequences, normalized to the most frequently observed cleavage Ala-Ala. E, cleavage dependence of P₁ and P₂ residues based on absolute number of occurred cleavages. F, relative frequency of P₂P₁-X cleavages, based on amino acid distribution in the protein sequences, normalized to the most frequently observed cleavage Ala-Leu-X.