Figure 9

OSN axon fasciculation in the olfactory nerve pathway. Sagittal sections of P2-lacZ/M72-GFP embryos. (A-D) Z-series projections taken from sagittal sections of E16 P2-lacZ or M72-GFP mice. Low-powered montages of the olfactory nerve pathway of (A) a heterozygous P2-lacZ mouse and (B, C) taken from a homozygous M72-GFP mouse. (B', C') High-magnification view of boxed areas in (B, C). (D) Low-powered montages of the olfactory nerve pathway taken from a P2-lacZ heterozygous mouse; (D') high-magnification view of the boxed area in (D). An orientation compass is shown in (A). Scale bars in (A, B, C, D) = 50 μm and in (B', C', D') = 10 μm.