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Cellular localization of BDKRB2 in the cauda region of rat epididymis. Double labeling for ATP6V1E1 (A, red) and BDKRB2 (B, green) revealed that principal cells (negative for ATP6V1E1; arrows) express BDKRB2 in their apical pole, and that clear cells (positive for ATP6V1E1) are negative for BDKRB2. C) Merged panel. Smooth-muscle cells are also labeled (arrowheads). Nuclei are labeled blue with DAPI. Bars = 20 μm.
