Figure. Concentration-dependent activation of NTSR1 by neuro­tensin. Reporter cells were transfected with the expression plasmid for neuro­tensin receptor 1 (NTSR1) and treated with various concentrations of neuro­tensin. 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 180 pM.