Analysis of a hexapeptide using enzymatic cleavage reveals the following result: Amino acid composition of the peptide is: 2R, A,V, S, Y Trypsin digestion yields two fragments and the compositions are: (R, A, V) and (R, S, Y) Chymotrypsin digestion yields two fragments and the compositions are: (A, R, V, Y) and (R, S) Digestion with carboxypeptidase A yields no cleavage product. Given: Trypsin cleaves at carboxyl side of R. Chymotrypsin cleaves at carboxyl side of Y. Carboxypeptidase A cleaves at amino side of the C-terminal amino acid (except R and K) of the peptide. The correct amino acid sequence of the peptide is:

Analysis of a hexapeptide using enzymatic cleavage reveals the followi

1.	Analysis of a hexapeptide using enzymatic cleavage reveals the following result: Amino acid composition of the peptide is: 2R, A,V, S, Y Trypsin digestion yields two fragments and the compositions are: (R, A, V) and (R, S, Y) Chymotrypsin digestion yields two fragments and the compositions are: (A, R, V, Y) and (R, S) Digestion with carboxypeptidase A yields no cleavage product. Given: Trypsin cleaves at carboxyl side of R. Chymotrypsin cleaves at carboxyl side of Y. Carboxypeptidase A cleaves at amino side of the C-terminal amino acid (except R and K) of the peptide. The correct amino acid sequence of the peptide is:
A.	RSYRVA
B.	AVRYSR
C.	SRYVAR
D.	SVRRYA
Answer» C. SRYVAR

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