arginine

n. type of amino acid

Arginine (abbreviated as Arg or R) is an α-amino acid. The L-form is one of the 20 most common natural amino acids. Its codons are CGU, CGC, CGA and CGG. In mammals, arginine is classified as a semiessential or conditionally essential amino acid, depending on the developmental stage and health status of the individual. Infants are unable to effectively synthesize arginine, making it nutritionally essential for infants. Adults, however, are able to synthesize arginine in the urea cycle.
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Arginine /ar·gi·nine/ a nonessential amino acid occurring in proteins and involved in the urea cycle, which converts ammonia to urea, and in the [more]Arginine - Community and Resources

Noun
1. a bitter tasting amino acid found in proteins and necessary for nutrition; its absence from the diet leads to a reduced production of spermatozoa
(hypernym) essential amino acid

n. arginine, type of amino acid