PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 20184889-2 2010 While beta 3-AR"s role in the cardiovascular system remains controversial, increasing evidence suggests that it serves as a "brake" in sympathetic overstimulation - it is activated at high catecholamine concentrations, producing a negative inotropic effect that antagonizes beta1- and beta2-AR activity. Catecholamines 189-202 adrenoceptor beta 3 Homo sapiens 6-15