PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
1493580-2	1992	Under normal conditions small quantities of oxygen free radicals are produced but they are quenched by intracellular free radical scavenging enzymes (superoxide dismutase, catalase and glutathione peroxidase) or alpha-tocopherol.	radicals	56-64	catalase	Homo sapiens	172-180	
8026586-3	1994	radicals and was inhibited by the addition of superoxide dismutase, catalase or OH.	radicals	0-8	catalase	Homo sapiens	68-76