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P2X7 receptors are expressed in the primary cilium of cultured human proximal tubular cells (HK-2). Cilia were stained with anti-acetylated-α-tubulin antibodies (green). P2X7 were stained with anti-P2X7 antibodies (red). Nuclei were stained with DAPI (blue). P2X7 (red) and acetylated-α-tubulin (green) are colocalized, as shown in the merged image (yellow).
