Confocal laser scanning microscopy (CLSM) images of PGP 9.5-LIR (PGP 9.5) in taste buds of rat and mouse circumvallate papillae. Longitudinal sections show a small subset of taste cells and nerve processes expressing PGP 9.5 in rat (A) and mouse taste buds (B). Both cytoplasm and nuclei of taste cells display PGP 9.5-LIR. Transverse sections show PGP 9.5-LIR in rat (C-E) and mouse taste buds (F-H). Immunoreactive taste cells and nerve processes are shown in C and F. Sytox-stained nuclei are shown in D and G and merges are shown in E and H. Scale bars = 20 μm.