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Definition of Alpha-amino acid
1. Noun. (biochemistry) Any amino acid that has the amino and carboxylic functional groups attached to the same carbon atom; especially those amino acids that occur naturally as peptides and proteins. ¹
¹ Source: wiktionary.com
Medical Definition of Alpha-amino acid
1. Typically, an amino acid of the general formula R-CHNH2-COOH (i.e., the NH2 in the a position); the l forms of these are the hydrolysis products of proteins. In rarer usages, this class of molecules also includes alpha-amino phosphoric acids and alpha-aminosulfonic acids. (05 Mar 2000)