aminoaciduria the presence of one or more amino acids in the urine in abnormal quantities because of a metabolic defect.

aminoacyl adenylate the activated compound that is an intermediate in the formation of a covalent bond between an amino acid and its specific transfer RNA; abbreviated AA-AMP. See AMP, transfer RNA.

aminoacyl-tRNA synthetases 21

Electrical Schematic Symbols

Structural formulas of the universal amino acids aminoacyl site one of two binding sites for tRNA aminoacyl-tRNA synthetases enzymes that acti-

molecules on a ribosome; commonly called the A site. See translation.

aminoacyl-tRNA an aminoacyl ester of a transfer RNA molecule.

aminoacyl-tRNA binding site See translation.

vate amino acids and attach each activated amino acid to its own species of tRNA. These enzymes catalyze: (1) the reaction of a specific amino acid (AA) with adenosine triphosphate (ATP) to form AA-AMP, and (2) the transfer of the AA-AMP complex to a specific transfer RNA, forming AA-tRNA and

Amino Acids

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