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Shape change occurred in BPE cells but not BPMEC treated with ATP. BPE cells (A and B) and BPMEC (C and D) were exposed to diluent (A and C) or 5 mM ATP (B and D) for 6 h and then photographed (magnification, ×100). The inset in panel B shows a higher-power magnification of BPE cells treated with ATP (magnification, ×400).
