. "The chemical reactions and pathways involving 1-aminocyclopropane-1-carboxylate, the anion of 1-aminocyclopropane-1-carboxylic acid, a natural product found in plant tissues. It is a key intermediate in the biosynthesis of ethylene (ethene), a fruit-ripening hormone in plants." . . . "1-aminocyclopropane-1-carboxylate metabolic process" . "1-aminocyclopropane-1-carboxylate metabolism" . "ACP metabolic process" . "ACP metabolism" . . . . .