NEET PG Medical – 2019 – Question – 38
Which amino acid is used to synthesise Nitric oxide ?
a) glycine
b) arginine
c) tyrosine
d) threonine
Show Answer
Correct Answer – B
ANSWER: B. Arginine
Nitric oxide is produced by a group of enzymes called nitric oxide synthases. These enzymes convert arginine into citrulline, producing NO in the process. Oxygen and NADPH are necessary co-factors.
Three distinct genes encode NOS isozymes: neuronal (nNOS or NOS-1), cytokine-inducible (iNOS or NOS-2) and endothelial(eNOS or NOS-3)
