Fig. S2.

Identification of mitotic neural stem and progenitor cells. Figure illustrating the methodology that we used in order to differentially identify neural stem and progenitor cells, based on the expression of PH3 (in green) and GFAP (in red). In panels A–A″ we show one mitotic cell co-expressing GFAP, thus considered to be NSC. In panels B–B″ we show one mitotic cell that does not co-express GFAP, thus considered to be progenitor. Please note that for each PH3 + cell we used at least three optical sections (with a 0.5 μm step) in order to allocate it within the NSC or the progenitor pool; these optical sections are illustrated separately in each panel. [This is an expansion of Figs. 3B and C. Scale bar = 10 μm. The star indicates the position of the nucleus of the PH3 + cell].