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amino acid
- any of a large group of organic acids containing a carboxyl group, COOH, and an amino group, NH
- any of the 25 amino acids that link together into polypeptide chains to form proteins that are necessary for all life: in general, they are water-soluble, crystalline, amphoteric electrolytes having mirror-image isomeric forms with right and left optical activity: ten of these () cannot be synthesized by the human body and must be consumed
See amino acid in American Heritage Dictionary 4
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