Fig. S4
dorsal and ventro-tuberal progenitors expand in absence of rx3. Side views (A-F) or transverse sections (G,H) of 55hpf ckh sibling or mutant embryos. White arrowheads in (A,B) point to ascl1- sox3- domains, not present in ckh mutants (C,D). Red arrowheads in (B) point to ectopic ascl1+ domains in the anterior hypothalamus, ventral tuberal hypothalamus and telencephalon. Red arrows in (A,B) indicate rostro-caudal length of ventro-tuberal hypothalamus. White arrowheads in (E,F) point to fgf3+ cells in ventro-tuberal hypothalamus. (I,J) Schematics of chk sibling (I) or mutant (J): boxed regions show areas shown in high power views. Scale bars: 50µm.