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O points) Deduce the sequence of a pentapeptide that contains the amino acids Ala, Lys, Gly, Ser, and Tyr, from the following experimental data. Edman degradation cleaves Gly from the pentapeptide, and trypsin treatment gives Ala and a tetrapeptide. Treatment of the pentapeptide with chymotrypsin forms a dipeptide and a tripeptide. Partial hydrolysis forms Gly, Ser, and the tripeptide Tyr-Lys-Ala.

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