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Fig. 4 Live-cell imaging of drug uptake using DIVE aptasensors. (A) HEK293T cells expressing DIVE.OFF and DIVE.ON controls. (B) HEK293T cells expressing DIVE_6 and treated with theophylline. (C) HEK293T cells expressing the DIVE_6 biosensor treated with caffeine. Scale bars: 100 μm. Results are from one experiment; two additional independent experiments were performed (Fig. S8†).
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