Expression of connexin 57 in the olfactory epithelium and olfactory bulb

► Expression of Cx57 in the olfactory epithelium is demonstrated using three research approaches. ► In the olfactory epithelium, basal cells and olfactory neurons express Cx57. ► Cx57 is expressed in juxtaglomerular cells, mitral cells and granule cells in the olfactory bulb. ► Patterned distribution of Cx57 positive cells are described. ► Immunoreactivity of Cx57 is weaker in the olfactory system compared to the retina.