Name	Info	Provider	Link
	free resource	Institute of Physiology, Academy of Sciences of the Czech Republic, Prague	http://www.biomed.cas.cz/physiolres/pdf/67/67_S37.pdf
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-ATM-4
Endothelin receptors - overview and references	free resource	Guide to Pharmacology	https://www.guidetopharmacology.org/GRAC/FamilyDisplayForward?familyId=21