A, Four constructs encoding mutant forms of NOS1AP are illustrated. B, D, F, Indicated constructs were electroporated into the lateral ventricular wall at E16 and brains were analyzed at E20. Representative images of coronal sections of rat somatosensory cortex are shown in each condition. Sections in B and D were immunostained for GFP (green) and counterstained with Hoechst (blue). C, E, G, Quantification of the percentage of transfected cells in each cortical area. Results are means ± SEM. *p<0.05 and **p<0.01 versus control. Scale bars: 150 µm.