Figure 1.

Bright-field photomicrograph of OMP distribution in the rat OE as revealed by immunohistochemistry. The OMP brown reaction product is distributed in the somata of mature olfactory sensory neurons, in their dendrites and knobs, the cilia, and their axons. Sustentacular cells, basal cells, and immature OSNs are unlabeled. This pattern is as previously reported^34,36,76 and thus serves as positive control for other rat tissues. Scale bar = 20 µm. Abbreviations: OMP, olfactory marker protein; OE, olfactory epithelium; OSNs, olfactory sensory neurons.