Figure. Concentration-dependent activation of TACR2 by neurokinin A. Reporter cells were transfected with the expression plasmid for tachy­kinin receptor 2 (TACR2) and treated with various concentrations of neurokinin A. 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 570 pM.