Question

A protein is imagined as a line, the left end is represented by first amino acid and the right end is represented by the last amino acid. The first and last amino acids are called as

• A. (N)-terminal amino acid and (C)-terminal amino acid, respectively
• B. (C)-terminal amino acid and (N)-terminal amino acid, respectively
• C. (O)-terminal amino acid and (C)-terminal amino acid, respectively
• D. $N{H}_2$-terminal amino acid and $COOH$-terminal amino acid, respectively

Answer 1

Answer: (A)

A protein is imagined as a line, the left end is represented by first amino acid and the right end is represented by the last amino acid. The first and last acids are called as N-terminal amino acid and C-terminal amino acid respectively.