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histidine methyl ester [Supplementary Concept]
RN given refers to (L)-isomer; structure given in first source
Date introduced: November 13, 1987
Amino Acids, Peptides, and Proteins
Amino acids and chains of amino acids connected by peptide linkages.
Year introduced: 1998
Amino Acids, Essential
Amino acids that are not synthesized by the human body in amounts sufficient to carry out physiological functions. They are obtained from dietary foodstuffs.
Year introduced: 1974
Amino Acids, Cyclic
A class of amino acids characterized by a closed ring structure.
Amino Acids
Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins.
Year introduced: /metabolism was AMINO ACID METABOLISM 1965