Nitric oxide is requires which of the following AA
Ref. Guyton. 13th edition. Page. 208
Synthesis of NO
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.
There are three isoforms of nitric oxide synthase (NOS)
The isoforms of NOS are neuronal NOS (or nNOS), endothelial NOS (or eNOS) and inducible NOS (or iNOS).
Arginine
Serine
Threonine
Lysine