PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1663060-1 1991 We have demonstrated with electron paramagnetic resonance (EPR) that organic hydroperoxides are decomposed to free radicals by both human polymorphonuclear leukocytes (PMNs) and purified myeloperoxidase. Free Radicals 110-123 myeloperoxidase Homo sapiens 187-202 1663060-6 1991 Our studies suggest that myeloperoxidase in PMNs is primarily responsible for the decomposition of organic hydroperoxides to free radicals. Free Radicals 125-138 myeloperoxidase Homo sapiens 25-40