In the structure of a protein,which groups ar | vedclass

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(A) protein is a polypeptide chain formed by amino acids linked by peptide bonds. In a polypeptide chain,the amino acid at one end has a free amino gr

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$-NH_2$ group and $-COOH$ group

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(A) protein is a polypeptide chain formed by amino acids linked by peptide bonds. In a polypeptide chain,the amino acid at one end has a free amino group $(-NH_2)$,which is called the $N$-terminal or amino-terminal end. The amino acid at the other end has a free carboxyl group $(-COOH)$,which is called the $C$-terminal or carboxyl-terminal end. Therefore,the $N$-terminal is defined by the presence of the $-NH_2$ group,and the $C$-terminal is defined by the presence of the $-COOH$ group.

In the structure of a protein,which groups are responsible for the $N$-terminal and $C$-terminal,respectively?

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