Expression of KCa channels and B2R in CRL-5904 cells and HBMEC. KCa channels (green) distributed in CRL-5904 cells (A~C) and HBMEC (G~I). The B2R (green) were expressed in CRL-5904 cells (D~F) and HBMEC (J~L). Cells were located by counterstaining with DAPI (blue, B, E, H, K) and merged images are also shown (C, F, I, L). Scale bar = 50 μm.