Which from following amino acids contains 'S' in its side chain (R)?

Step-by-step solution

Amino acid side chains containing sulfur include methionine, with the structure - CH ₂- CH ₂- S - CH ₃ . Lysine has - CH ₂)₄- NH ₂ , glutamic acid - CH ₂- CH ₂- COOH , and glycine - H —none contain sulfur. Only methionine includes sulfur in its R group.