Olanzapine inhibition of glucose transport by N136A, R367A and wild-type GlcPSe. Wild-type and N136A GlcPSe RSO vesicles or R367A GlcPSe cells were pre-incubated with different concentrations of olanzapine for 1 min, before measuring glucose uptake. IC50,wild-type = 0.9 ± 0.1 mM; IC50,N136A = 1.5 ± 0.2 mM; IC50,R367A = 0.8 ± 0.1 mM. Error bar is standard deviation from 3 different measurements.