PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 13679077-14 2003 Generation of 8-nitroxanthine by peroxynitrite and myeloperoxidase could represent a positive feedback mechanism that enhances further the production of both reactive oxygen and nitrogen species in ischemic tissue that is reperfused. reactive oxygen and nitrogen 158-186 myeloperoxidase Homo sapiens 51-66