Figure 1.

Renal olfactory receptors. The mouse, rat, and human kidneys are known to express a growing list of olfactory receptors (ORs). Although the localization of most remains unknown (list on the left), several of these have been identified in distinct parts of the nephron. As listed, human ORs begin with the prefix “OR,” murine ORs begin with “Olfr,” and rat ORs start with “Olr.” *Murine Olfr78, rat Olr59, and human OR51E2 are functional orthologs. ^Murine Olfr558, rat Olr63, and human OR51E1 are functional orthologs.