Figure 3.

Vagina-projecting neurons express BMP4 receptors. A, B, Neurons projecting specifically to the vaginal submucosa were labeled after Alexa Fluor-488-conjugated recombinant CTB injection, as shown here in an S1 DRG. C, D, Retrogradely labeled neurons frequently display peripherin-IR. E, F, Vagina-projecting neurons exhibit IR for both BMPR1A and BMPR2. G, H, Arrows indicate CTB-labeled, peripherin-positive neurons expressing BMPR. Arrowheads indicate CTB-labeled, peripherin-negative neurons expressing BMPR. Scale bar, 50 μm (for all panels).