PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25531180-2 2015 The list of metal ions studied here includes Zn(II), Cd(II), Ni(II), Co(II), and Cu(I). Metals 12-17 mitochondrially encoded cytochrome c oxidase II Homo sapiens 69-74