PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 23274253-1 2013 The chelating behavior of ligands based on carbohydrazone core modified with pyridine end towards Co(II), Ni(II) and Cu(II) ions have been examined. pyridine 77-85 mitochondrially encoded cytochrome c oxidase II Homo sapiens 98-104