Fig. (2) The intra-plate T₃ dose-response curves for 27 different plates. In each plate T₃ was used as positive control. After plating at 1500 cells/well in 1536-well plates and incubated for 4 h, cells were stimulated with the indicated concentration of T₃ for 24 h. Log M T₃ concentrations are indicated on the x-axis.