DAB immunoelectron micrographs showing Type II cells (TC) with “atypical” mitochondria located only at close appositions with P2X2 immunoreactive nerve processes. A: A P2X2-LIR nerve process (N) is partially enveloped by a large “atypical” mitochondrion (arrow). B: A Type II cell containing two large “atypical” mitochondria (arrows) that are in contact with a P2X2-LIR nerve process (N). m: regular mitochondrion. Scale bars = 0.5 μm.
Yang et al. BMC Neuroscience 2012 13:51 doi:10.1186/1471-2202-13-51