(E) QRT-PCR assay of PAX6 and SOX1 in control and V1-PAKI cells on day 16 of dorsal neural differentiation, p=0.0146. Data information: Data are presented as mean ±SEM from three independent experiments (n=3). *p<0.05, **p<0.01, ***p<0.001 (unpaired two-tailed Student's t-test). 