PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11487528-7 2001 Peroxynitrite, a highly reactive nitrogen molecule derived from the interaction of NO and superoxide anion, significantly increased COX-2 expression. Superoxides 90-106 mitochondrially encoded cytochrome c oxidase II Homo sapiens 132-137