PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 14983000-10 2004 We propose that functional heterodimerization enhances the isozyme diversity of the ACS gene family and provides physiological versatility by being able to operate in a broad gradient of S-adenosylmethionine concentration in various cells/tissues during plant growth and development. S-Adenosylmethionine 187-207 1-amino-cyclopropane-1-carboxylate synthase 2 Arabidopsis thaliana 84-87