Fig. 6

Expression pattern of ancV1R in lungfish and gar. (A) The expression pattern of ancV1R (green) in a sagittal section of the olfactory organ of lungfish. The dotted and solid squares indicate LOE and RecE, respectively. (A’) High magnification view of the dotted square in (A). Note that ancV1R is expressed in the basal layer of the LOE. (A”) Higher magnification view of the solid square in (A). ancV1R is expressed in the sensory epithelium of the RecE surrounded by a dotted line. Asterisks indicate the location of the nonsensory epithelium. (B) The expression pattern of OMP in a horizontal section of the olfactory organ of spotted gar. (B′) Higher magnification of the dotted square in (B). Note that ancV1R is expressed by most sensory neurons scattered in the concave regions of the lamella. The dotted line indicates the center of the lamellae. The scale bars indicate 500 μm (A, B), 100 μm (A’, B′), or 20 μm (A”)