PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3182500-8 1988 Pretreatment with catalase (1,000 U/ml) and superoxide dismutase (250 U/ml) attenuated the EPR signal, indicating that proximal formation of O2 free radicals was in part responsible for the signal. Superoxides 141-143 catalase Oryctolagus cuniculus 18-26