The correct sequence of amino acids present in the tripeptide given below is
Biomolecules · Class 12 · JEE Main Previous Year Question
The correct sequence of amino acids present in the tripeptide given below is
- a✓
ValSerThr
- b
ThrSerVal
- c
LeuSerThr
- d
ThrSerLeu
ValSerThr
Step 1: Identifying the Terminal Residues — The sequence of a tripeptide is read from the amino (N) terminus (left) to the carboxyl (C) terminus (right).
Step 2: Side Chain Mapping — 1st residue (N-term) has an isopropyl group (Valine). 2nd residue has a group (Serine). 3rd residue (C-term) has a group (Threonine).
Step 3: Final Sequence — This corresponds to the sequence: ValSerThr. Correct option is (a).
Common Mistake: Mixing up leucine and valine, or threonine and serine. Threonine has a branched side chain compared to serine.
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