PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25760981-10 2015 (-) from a carbon atom not involved in the pi conjugation system of the corrin occurs in the first step, resulting in formation of a Co(III) C-centered radical that undergoes rapid intramolecular electron transfer to form the corresponding Co(II) carbocation complex for about 50 % of these complexes. corrin 72-78 mitochondrially encoded cytochrome c oxidase II Homo sapiens 133-138