Used for the quantitative measurement of Endothelin-1 (ET-1) levels in biological samples such as plasma, serum, and cell culture supernatants. This research kit is widely applied in cardiovascular studies to investigate endothelial function, vascular tone regulation, and pathophysiological conditions like hypertension, heart failure, and atherosclerosis. It is also utilized in pulmonary research, particularly in pulmonary arterial hypertension, and in renal disease studies where ET-1 plays a role in vasoconstriction and fibrosis. The assay enables high sensitivity and specificity detection, supporting both clinical research and drug development targeting the endothelin system.