Which of the following is not an endothelium derived relaxing factor?
a) Endothelium derived hyperpolarising factor
b) Nitric oxide
c) Prostacyclin
d) Thromboxane A2
Endothelium derived hyperpolarising factor (EDHF) is one of the three endothelium-derived relaxing factors, others being nitric oxide and prostacyclin.