Receptors, EndothelinReceptor, Endothelin BReceptor, Endothelin AViper VenomsEndothelinsEndothelin-1Endothelin-3Endothelin-2Peptides, CyclicPhenylpropionatesSulfonamidesVasoconstrictionPyrrolidinesAspartic Acid EndopeptidasesAzepinesIndansOligopeptidesVasoconstrictor AgentsPiperidinesMetalloendopeptidasesBlood PressureRats, Sprague-DawleyAntihypertensive AgentsEndothelium, VascularMuscle, Smooth, VascularHypertension, PulmonaryProtein PrecursorsPeptidesHemodynamicsNitric OxideRats, WistarRNA, MessengerRenal CirculationVascular ResistanceKidneyDose-Response Relationship, DrugHypertensionDioxolesRats, Inbred WKYDansyl CompoundsCells, CulturedVasodilator AgentsPulmonary ArteryMuscle ContractionPyrimidinesAtrial Natriuretic Factor