Arginine, also known as l-arginine, is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group, an α-carboxylic acid group, and a side chain consisting of a 3-carbon aliphatic straight chain ending in a guanidino group. At physiological pH, the carboxylic acid is deprotonated, the amino group is protonated, and the guanidino group is also protonated to give the guanidinium form, making arginine a charged, aliphatic amino acid. It is the precursor for the biosynthesis of nitric oxide. It is encoded by the codons CGU, CGC, CGA, CGG, AGA, and AGG.
|Appearance||White crystals or crystalline powder||Conforms|
|Loss on drying||≤0.50%||0.25%|
|Residue on ignition||≤0.30%||0.08%|
|Appearance:||White crystals or crystalline powder|
Used as a nutritional supplement; flavoring agents or pharmaceutical ingredients.
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