a-b, siRNA-mediated down regulation of CDC components in WT NPCs causes longer cilia (Ofd1 ***p<0.001, Nde1 **p<0.01), retarded cilia disassembly as shown by increased numbers of ciliated cells (Ofd1 **p<0.01, Nde1 *p<0.05) and differentiation of NPCs into TUJ1 positive cells (Ofd1 **p<0.001, Nde1 *p<0.01). In controls, a non-targeting siRNA (scrambled) is used. Western blots at right validate siRNAs-mediated Nde1 and OFD1 depletion. Error bars are s. e. m. Ordinary Two-way ANOVA followed by Sidak's multiple comparisons test. n = 3 independent experiments. 275 cells for scrambled, 423 cells for Ofd1 siRNA and 255 cells for Nde1 siRNA. 