Expression of NFIX in the embryonic cerebellum. A,B: Sagittal section of an E17 brain, showing expression of NFIX. A: NFIX was strongly expressed within the dorsal telencephalon at E17 (arrow in A). B: Higher magnification view of the boxed region in A, showing that NFIX was expressed widely, but at a low level, throughout the developing cerebellar anlage. Scale bar = 200 µm in B; 1,000 µm for A.