Kinetics of expression of selectin ligands is not altered by the absence of T-bet. Cells from T-cell activation cultures as in Figure 1 were also analyzed over time by FACS with selectin chimeras to determine the fraction which expressed ligands for (A) E-selectin or (B) P-selectin. Filled symbols, Th1; open symbols, Th0; squares, WT; circles, T-bet^-/-. One of at least 5 experiments.