PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9256439-1 1997 The crystal structures of cytochrome c oxidase from both bovine and Paracoccus denitrificans reveal two putative proton input channels that connect the heme-copper center, where dioxygen is reduced, to the internal aqueous phase. Oxygen 178-186 cytochrome c oxidase subunit 6A1, mitochondrial Bos taurus 26-46