Figure. Concentration-dependent activation of SSTR4 by somato­statin-14. Reporter cells were transfected with the expression plasmid for somato­statin receptor 4 (SSTR4) and treated with various concentrations of somato­statin-14. Data points shown are the mean ± SEM of an experiment performed in triplicate, and the curve is a fit to Hill equation with an EC50 of 290 pM.