Movie 1.

Analysis of NPC marker expression reveals sox2^low expressing cells as progenitors. Movie from stack of HCR expression analysis shown in Fig. 4C-C'' and Fig. S5 (see legends for details). The movie analyzes ascl1b (red), neurog1 (blue) and sox2 (green) expression in the thalamus of a 72 hpf WT larva. The movie starts with the dorsal most horizontal plane of the image stack and ends with the ventral most plane. Orientation: anterior to the left. pin, pineal gland; pth, prethalamus; th, thalamus proper.