Which amino acid is the primary precursor for the synthesis of nitric oxide in mammals?

A Arginine ✓
B Glutamine
C Lysine
D Methionine

Explanation

Arginine is the primary precursor for the synthesis of nitric oxide in mammals, which plays a crucial role in various physiological processes including vasodilation and neurotransmission.

Mnemonic

'Arg' = 'arguably' important for NO synthesis

Source

Berg et al., Biochemistry
Protein Metabolism Biochemistry Amino Acid Metabolism Hard MEDICAL Confidence: high