heme b PROTOPORPHYRIN IX CONTAINING FE PMID:29286160 haem b Haem PMID:20546754 A metalloprotoporphyrin in which the four pyrrole nitrogens of the protoporphyrin moiety are coordinated to iron. It is the most abundant of the heme compounds. CAS:14875-96-8 heme b KEGG:C00032 (7,12-diethenyl-3,8,13,17-tetramethylporphyrin-2,18-dipropanoato)iron ECMDB:ECMDB03178 heme protoheme PDBeChem:HEM chebi_ontology PDB:3KS0 Protoheme IX CHEBI:26355 COMe:MOL000013 Wikipedia:Heme_B Protoheme [3,7,12,17-tetramethyl-8,13-divinylporphyrin-2,18-dipropanoato(2-)]iron Heme B heme metalloprotoporphyrin