PMID-sentid Pub_year Sent_text compound_name comp_offset prot_official_name organism prot_offset 24515122-6 2014 Biosynthesis of the isobacteriochlorin heme d 1, a cofactor of the dissimilatory nitrite reductase cytochrome cd 1, has also been a subject of much research, although the biosynthetic pathway and its intermediates have evaded discovery for quite some time. isobacteriochlorin heme 20-43 CD1c molecule Homo sapiens 110-114