Figure 3

hoxb1a and hoxb1b are required for neuronal differentiation in the hindbrain. 48hpf wild type (A, F), hoxb1a^−/−(B, G), hoxb1b^−/−(C, D, H, I) or doubly hoxb1a^−/−;hoxb1b^−/− embryos (E, J) were assayed by immunostaining for the differentiation of branchiomotor neurons (islet1/2 staining in A-E) and Mauthner neurons (3A10 staining in F-J). Colored arrowheads indicate r4 (yellow), r5 (blue) and r6 (red). All embryos are flat mounted in dorsal view with anterior to the top.