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(A) The abbreviation $Phe-Val-Ala$ represents a tripeptide consisting of Phenylalanine $(Phe)$,Valine $(Val)$,and Alanine $(Ala)$ in that specific ord

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(A) The abbreviation $Phe-Val-Ala$ represents a tripeptide consisting of Phenylalanine $(Phe)$,Valine $(Val)$,and Alanine $(Ala)$ in that specific order.$1$. $Phe$ (Phenylalanine) has the side chain $-CH_2C_6H_5$.$2$. $Val$ (Valine) has the side chain $-CH(CH_3)_2$.$3$. $Ala$ (Alanine) has the side chain $-CH_3$.In the structure of a peptide,the amino acids are linked by peptide bonds $(-CONH-)$. The structure starts with the $N$-terminal amino acid $(Phe)$ and ends with the $C$-terminal amino acid $(Ala)$.Looking at the options:- Option $A$ shows the sequence $Phe-Val-Ala$ correctly: the first amino acid has a benzyl side chain $(Phe)$,the second has an isopropyl side chain $(Val)$,and the third has a methyl side chain $(Ala)$.Therefore,the correct structure is represented by option $A$.

Choose the peptide that matches the abbreviation $Phe-Val-Ala$.

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