The correct sequence of amino acids present in the tripeptide given below is :
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- Val - Ser - Thr
- Thr - Ser - Val
- Leu - Ser - Thr
- Thr - Ser - Leu
The Correct Option is A
Solution and Explanation
Residue 1: the \(\alpha\)-carbon bears \(\mathrm{CH(CH_3)_2}\) (two Me on one carbon) = valine (Val).
Residue 2: side chain \(\mathrm{CH_2OH}\) = serine (Ser).
Residue 3: side chain \(\mathrm{CH(OH)CH_3}\) (Me and OH on the same carbon) = threonine (Thr), attached to the \(\mathrm{COOH}\).
Sequence: Val - Ser - Thr.
Answer: (1) Val - Ser - Thr
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