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Release of ATP by immature (circles) and mature (squares) HL-60 cells under the influence of physiological (A) and elevated (B) Panavir concentrations of: 2.5 (blue), 10 (red), 100 (orange), and 1000 ng/ml (purple). The gray dotted lines show the background concentration of ATP in the culture medium. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
