Problem

Determine the amino acid sequence of a polypeptide from the following data:a. Complete hyd...

Determine the amino acid sequence of a polypeptide from the following data:

a. Complete hydrolysis of the peptide yields the following amino acids: Ala, Arg, Gly, 2 Lys, Met, Phe, Pro, 2 Ser, Tyr, Val.

b. Treatment with Edman’s reagent gives PTH-Val.

c. Carboxypeptidase A releases Ala.

d. Treatment with cyanogen bromide yields the following two peptides:

1. Ala, 2 Lys, Phe, Pro, Ser, Tyr

2. Arg, Gly, Met, Ser, Val

e. Treatment with trypsin yields the following three peptides:

1. Gly, Lys, Met, Tyr

2. Ala, Lys, Phe, Pro, Ser

3. Arg, Ser, Val

f. Treatment with chymotrypsin yields the following three peptides:

1. 2 Lys, Phe, Pro

2. Arg, Gly, Met, Ser, Tyr, Val

3. Ala, Ser

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