Figure. Concentration-dependent activation of FFAR4 by GPR120 cpdA. Reporter cells were transfected with the expression plasmid for free fatty acid receptor 4 (FFAR4) and treated with various concentrations of GPR120 cpdA. 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 1.9 µM.