PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7263619-10 1980 In the presence of antimycin cytochrome b561 cannot equilibrate with the quinone and undergoes oxidation, while cytochrome b566 reequilibrates with the quinone and thus regains redox equilibrium with the fumarate succinate redox buffer. quinone 73-80 cytochrome b561 Homo sapiens 29-44