[Lys4] Sarafotoxin S6c

[Lys4] Sarafotoxin S6c is a potent and selective endothelin ETB receptor partial agonist. It induces vasoconstriction in isolated tissues like pig coronary arteries with an EC50 of 1.5 nM. This analog is widely used in cardiovascular research to study endothelin receptor function and signaling pathways in vitro.