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Practice question In a hypothetical serine protease, the S, pocket is small and hydrophobic, S2 has a glutamic acid in the bottom, the S, pocket has a serine in the bottom, and the S,' pocket has an aspartic acid in the bottom. a) Which sequence would this protease be likely to recognized ? S3 S1 A. Ala -Trp - Arg - Lys O H H H n=O N B. Phe -Lys - Ala - Arg N H H H H C. Ala - Lys - Phe - Arg P2 D. Lys - Arg - Ala - Trp S2 S1' 3 Modified from Figure 6.11, Biochemistry, 10th ed