PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11522124-11 2001 One known morphogen, retinoic acid, has the enzymes retinal dehydrogenase (RALDH) and CYP26 maintaining its actions, the former responsible for its generation and the latter for its elimination. Tretinoin 21-34 cytochrome P450 family 26 subfamily A member 1 Homo sapiens 86-91