PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 10591529-4 1999 When the midpoint potential of the Rieske cluster is more positive than that of the heme of cytochrome c1, reduction of cytochrome b is biphasic. Heme 84-88 mitochondrially encoded cytochrome b Homo sapiens 120-132