PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22134498-2 2012 Speciation of cobalt active sites into Co(II), mono- and polynuclear oxo-cobalt species as well as CoO clusters was quantified by IR using CO and NO as probe molecules. Cobalt 14-20 mitochondrially encoded cytochrome c oxidase II Homo sapiens 39-45