Olfactory receptor cell staining using horseradish peroxidase

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Abstract
Iontophoretic injection of horseradish peroxidase into severed olfactory nerve fascicles has been used to stain salamander olfactory receptor cell somata, their associated nerves, and their axonal terminations in the glomerular layer of the olfactory bulb. This technique gives homogeneous, Golgi‐like staining of individually identifiable receptor cells and has permitted preliminary mapping of the topographical relationship between the loci of receptors in the olfactory mucosa and sites of their termination in the glomerular layer in the olfactory bulb.