Figure 6

Trajectory of the OSN axons crossing the basal lamina. Sagittal sections of P2-lacZ/M72-GFP embryos. (A-E) Z-series projections taken from sagittal sections of E16 heterozygous P2-lacZ (red) and M72-GFP (green) mice. (A, D, E) P2 OSNs within the OE. The axons turn sharply towards the bulb as they exit the basal lamina (open arrow in (A)). (B) Three OSNs (two P2, one M72) within the OE. (C) Two M72 axons within the OE. Sometimes the axons initially turn the wrong way and have to correct their trajectory as they travel towards the bulb. Scale bar in (A-E) = 50 μm.