her8a expression in the early neural plate is partially dependent on the expression of SoxB factors. Dorsal views of flat-mounted embryos analyzed at the 5-somite stage (A-F) and 3-somite stage (G-H) for the expression of the genes indicated (color-coded). A-F. her8a expression overlaps with that of the Sox family members sox2, sox3, sox19a, sox19b and sox21a, including the mid- and anterior hindbrain (red brackets). G-I. the simultaneous knockdown of sox2/3/19a/19b and 21a causes a reduction of her8a expression in the MH area of the early neural plate (white arrows).