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Frequency distribution of residues in P1 and P2 position of DP8 and DP9 candidate substrates. The frequency distribution of amino acids in the P1 (A and B) and P2 (C and D) position of candidate substrates identified in Table 3 are given for DP8 (A and C) and DP9 (B and D). The exact number of peptides in which each residue is found in the P1 or P2 position is given along with the percentage relating to frequency distribution.
