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The chemical conversion of arginine to citrulline, known as citrullination or deimination. Citrullination or deimination is the conversion of the amino acid arginine in a protein into the amino acid citrulline. Citrulline is not one of the 20 standard amino acids encoded by DNA in the genetic code.
Citrulline is also produced as a byproduct of the enzymatic production of nitric oxide from the amino acid arginine, catalyzed by nitric oxide synthase. In the yeast species Saccharomyces cerevisiae, citrulline is a metabolic intermediate in the latter, cytosolic half of the arginine biosynthesis pathway.
Arginine is the amino acid with the formula (H 2 N)(HN)CN(H)(CH 2) 3 CH(NH 2)CO 2 H. The molecule features a guanidino group appended to a standard amino acid framework. At physiological pH, the carboxylic acid is deprotonated (−CO 2 −) and both the amino and guanidino groups are protonated, resulting in a cation.
One source recommends an L-citrulline dosage of 2,000 milligrams three times a day, or 1.76 grams of citrulline malate for every 1 gram of citrulline you might take for circulatory health.
Notably, a study looking at L-arginine and L-citrulline levels in men found that men with severe ED with an arteriogenic etiology had lower levels of these two amino acids, indicating a possible ...
In enzymology, an arginine deiminase (EC 3.5.3.6) is an enzyme that catalyzes the chemical reaction. L-arginine + H 2 O L-citrulline + NH 3. Thus, the two substrates of this enzyme are L-arginine and H 2 O, whereas its two products are L-citrulline and NH 3.
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