Quantitative RT-PCR expression analysis of BCL11B in human CD34+ thymocyte progenitors after 2 days, respectively, of coculture on OP9 stromal cells expressing different Notch ligands. Graphs show mean expression, relative to the geometric mean of ACTIN and GAPDH and relative to the OP9-DLL1 cultured cells (n=4 independent experiments with different donors, error bars indicate SEM and * indicates p<0.05 and ns (not significant) indicates p>0.05 in a paired t-test). 