PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
21403766-3	2011	To probe the origin and structure of this radical, we combined EPR analysis with nitric oxide (NO) trapping of tyrosine and substrate derived radicals for both PGHS-1 and -2.	Nitric Oxide	81-93	prostaglandin-endoperoxide synthase 1	Homo sapiens	160-173