Fig. 7. Neurons with Numb have longer neurites than those without Numb. E10.5 cortical cells were cultured at low density for 7 days, then fixed and stained for Numb and ß-tubulin III. The total neurite length of Numb⁺ neurons was compared with that of Numb^– neurons. (A) The percentage of neurons within each neurite length category is shown. Generally, Numb⁺ neurons had longer processes than Numb^– neurons. (B) The mean neurite length per neuron was calculated; there was a significant difference, approximately three fold, for Numb⁺ versus Numb^– neurons. *P<0.001. Bars represent standard errors.