A DAB immunoelectron micrograph demonstrates that P2X2-LIR is present in nerve processes in a transverse section of a taste bud. The P2X2 immunoreactive nerve processes (arrows) are in close apposition with Type II (II) and Type III (III) taste cells. Inset: A P2X2-LIR nerve process (N) closely contacts a Type III taste cell (III); its nucleus contains characteristic electron-dense patches of heterochromatin (arrowhead). Scale bar = 2 μm; Scale bar = 0.5 μm in Inset.
Yang et al. BMC Neuroscience 2012 13:51 doi:10.1186/1471-2202-13-51