- activated c. derivative of a carboxyl group that is more susceptible to nucleophilic attack than a free carboxyl group; E.G., acid anhydrides, thioesters.
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carboxylic acid n an organic acid (as an acetic acid) containing one or more carboxyl groups
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any acid containing the carboxyl (
COOH) group, including amino acids and fatty acids.
Medical dictionary. 2011.