obsolete regulation of 1-aminocyclopropane-1-carboxylate metabolic process https://github.com/geneontology/go-ontology/issues/31171 true The reason for obsoletion is that this term was an unnecessary grouping terms and only 'biosynthetic' or 'catabolic' process should be used. biological_process GO:0010602 OBSOLETE. Regulation of 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.