Lysine vs. Arginine

Lysinenoun

(amino acid) An essential amino acid, C₆H₁₄N₂O₂.

Argininenoun

An amino acid found in animal foods that plays an important role in several physiological processes.

Lysinenoun

an essential amino acid found in proteins; occurs especially in gelatin and casein

Argininenoun

a bitter tasting amino acid found in proteins and necessary for nutrition; its absence from the diet leads to a reduced production of spermatozoa

Lysine

Lysine (symbol Lys or K) is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated −NH3+ form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO− form under biological conditions), and a side chain lysyl ((CH2)4NH2), classifying it as a basic, charged (at physiological pH), aliphatic amino acid.

Arginine

Arginine, also known as l-arginine (symbol Arg or R), 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.