What will be the correct representation of the above tripeptide?

Ala-Phe-Gly

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Ala-Gly-Phe

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Gly-Phe-Ala

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Gly-Ala-Phe

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Solution

The correct option is C Gly-Phe-Ala
Conventionally, in peptide chain the consituent amino acid retaining free amino group is represented at the left end (N-terminus) while the one having free carboxy group represented to the right end (C-terminus).
Rearranging given tripeptide according to N-terminus and C-terminus and cleaving amide bonds, we get the constituents amino acids.

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