PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19678668-6 2009 The redox waves of Co(II)/Co(I) in 2a and 2a" were slightly different from those of other complexes because of the short polymethylene chain. polymethylene 121-134 mitochondrially encoded cytochrome c oxidase II Homo sapiens 19-25