Fig. 7. Expression of a stabilized form of ß-catenin does not promote neuronal differentiation in the cortical NPCs from E10.5. (A,B) NPCs isolated from E10.5 (A) or E13.5 (B) were acutely plated on poly-D-lysine coated coverslips and infected with a retrovirus encoding either GFP alone (control) or both GFP and S33Y ß-catenin. The cells were incubated for 2 days with Fgf2, and the percentage of TuJ1⁺ cells among GFP⁺ cells was determined. ^*P< 0.02 and ^**P<10^-9 versus control.