Figure 13.

A comparison between the conventional four-zone model and the labeling observed with the panel of eight OR probes. The territories for each of the eight probes is shown only along the septal epithelium, except for OR 37, expression of which is limited to the mucosa on the tips of the turbinates (dorsal is to the left). The boundaries for the four zones are transposed from the published patterns of labeling of the mouse epithelium used to develop the four-zone model in relation to the various turbinates (Sullivan et al., 1996). In particular, the ventral boundary for zone 1 is aligned with the boundary between high and low expression levels of the Ig-CAM superfamily member, OCAM/mamFasII, which has been described previously (Yoshihara et al., 1997). OR14 labeling extends into the epithelial region in which OCAM/mamFasII is highly expressed (H. Fang and J. E. Schwob, unpublished observations).