L-Citrulline-AC02040c

Citrulline is made from ornithine and carbamoyl phosphate in one of the central reactions in the urea cycle. It is also produced from arginine as a byproduct of the reaction catalyzed by NOS family (NOS; EC 1.14.13.39).[6] It is made from arginine by the enzyme trichohyalin at the inner root sheath and medulla of hair follicles.[7] Arginine is first oxidized into N-hydroxyl-arginine, which is then further oxidized to citrulline concomitant with release of nitric oxide

L-Citrulline is in white crystalline powder, with no less than 98.0%