Figure 5.

Pheromones that evoked intracellular Ca²⁺ elevation in vomeronasal sensory neurons (VRNs). The fluorescence images are displayed on gray (A) and pseudocolor scales (B). (C) Traces and images of VRNs responsive to 10⁻⁵ M 2-heptanone, 10⁻⁷ M MUP13, 10⁻⁷ M OBP3, and 50 mM KCl (positive control). (D) Comparisons of the percentage of pheromone-activated cells between Rnc and Rnh rats (independent t-test, n = 4 for each subspecies, ^***P < 0.001). The scale bar in the images represents 20 µm.