Vmn1r232 (vomeronasal 1 receptor 232; also called V1Re4) is a member of the vomeronasal organ V1R gene family, whose activation is believed to be involved with pheromone detection. Inputs from neurons expressing closely related V1Rs intermingle within shared, spatially conserved domains of the accessory olfactory bulb (AOB). Vomeronasal sensory neurons expressing Vmn1r232 are labeled with tau-GFP in this mutant strain.