PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 4402537-7 1972 The acridine system has the attractive property that the enzyme, ferredoxin-NADP reductase, is the only component of the system that absorbs appreciably in the visible region of the spectrum. Acridines 4-12 ferredoxin reductase Homo sapiens 65-90