Summary of cells in the DN labeled at each stage of electroporation.

All sagittally sectioned samples in which both VZ- and uRL-derived cells were labeled were analyzed. Coronally sectioned samples were excluded from this table because it was difficult to systematically identify the labeled cells from their morphology in the coronal planes. mCherry, pCAGGS-mCherry; Tol2-GFP, a mixture of pCAGGS-T2TP and pT2K-CAGGS-EGFP; Cre*, pCAGGS-Cre was introduced into Ai9 mouse embryos. Number of samples from Tol2-GFP-introduced mice is three for each stage of electroporation. Number of samples from Cre introduced Ai9 mice is as follows: n = 1 (electroporated at E10.5), n = 2 (electroporated at E11.5), n = 3 (electroporated at E12.5). +, ++: more than 4 cells were labeled in all samples; −: no cells were labeled in all samples; +/−: more than 4 cells were labeled in subsets of all samples. NA: not available.