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Localisation of P2X7 receptors and TUNEL in an excised melanoma from an ATP-treated mouse. a Red extracellular P2X7 staining. b Green intracellular TUNEL staining. c Localisation of extracellular P2X7 receptors and intracellular TUNEL in ATP-treated melanoma tissue undergoing apoptosis. Calibration bars = 50 μM
