PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
2115855-9	1990	The cause of nitrate tolerance is regarded as an insufficient or absent stimulation of guanylate cyclase and, consequently, inadequate generation of cyclic GMP due to availability of thiol substrate.	Nitrates	13-20	5'-nucleotidase, cytosolic II	Homo sapiens	156-159