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Q45 Analysis of a hexapeptide using enzymatic cleavage reveals the following result:0 Amino acid composition of the peptide is: 2K. AX, S= Yo Trypsin digestion yields txvo fragments and the compositions are: (R A, Y) and (R, S: Y)o Chymotrnnsin digestion yields txvo fragments and the compositions are: (A, K Y: Y) and(K. S)o Digestion with carboxypeptidase A yields no cleavage product.Given: Trypsin cleaves at carboxyl side of RChymotrypsin 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:

  1. RSYRYA
  2. AYRYSR
  3. SRYYAR
  4. SVRRYA
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