Q14 · CSIR NET Chemistry, December 2012
Paper: CSIR NET December 2012 · Subject: Organic Chemistry · Chapter: Natural Products · Topic: Amino Acids Peptides · Marks: 2 · Difficulty: Medium
A tripeptide gives the following products on Edman degradation. 
+ 
The tripeptide is
+ The tripeptide is(a)Phe-Ala-Gly
(b)Phe-Gly-Ala
(c)Ala-Gly-Phe
(d)Gly-Ala-Phe
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Edman degradation removes the N-terminal residue as its PTH derivative; here it is phenylalanine (benzyl side chain). The remaining dipeptide is Ala-Gly, so the tripeptide is Phe-Ala-Gly (a).
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