The amino acid residue having an imino side chain is

NEET PG Biochemistry
#1

The amino acid residue having an imino side chain is

  1. Lysine

  2. Histidine

  3. Tyrosine

  4. Proline

exp:

One of the 20 standard amino acids, proline is an imino (-NH) acid not an amino (-NH2) acid as are other 19.
The side chain of proline and its α-amine group form a ring structure and thus proline differs from other amino acids, in that it contains an imino group, rather than an amino group.
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