Main Page | See live article | Alphabetical index 1-Aminocyclopropane-1-carboxylic acid (ACC) is a disubstituted cyclic amino acid. The three-membered cycle is attached to the C(alpha)-atom. ACC plays an important role in the biosynthesis of the herbal hormone ethylene. It is synthesized by ACC synthase enzyme from methionine and converted to ethylene by ACC oxidase. See also: List of particles This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.