Figure. Concentration-dependent activation of CCR6 by CCL20. Reporter cells were transfected with either the expression plasmid for C-C motif chemo­kine receptor 6 (CCR6) or the mock plasmid and treated with various concentrations of C-C motif chemo­kine ligand 20 (CCL20). 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 3.8 nM.