PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
8499606-2	1993	In the present study we demonstrate that both ET-1 (Emax: 238 +/- 29% of potassium contraction) and ET-2 (Emax: 231 +/- 36%) produce strong concentration-dependent contractions of circular segments of guinea-pig middle cerebral artery, whereas ET-3 has only weak effects (Emax: 32 +/- 13%).	Potassium	73-82	endothelin-1	Cavia porcellus	46-50