SST2 in the adult mouse cochlea. A, overview, SST2 (red) can be observed in the OC and the SG; cell nuclei (DAPI) are in blue. B-C, SST2 (red) can be detected in outer HCs, inner HCs, and the membrane of Deiters' cells, as well as in outer and inner pillar cells. D, labeling with the neurofilament marker SMI31 (green) demonstrates that cochlear afferent neurons (CANs), which connect the SG with the OC, do not express SST2; cell nuclei (DAPI) are in blue. (A) Image by immunofluorescence microscopy, scale bar = 50 μm. (B-D) Images by confocal microscopy, scale bar = 25 μm.