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Binding and internalization of the GFP-CT and mRFP-CT chimeras by Vero cells. (A) FITC-CTB (10 μg/ml) at 4°C (frame 1) and at 37°C (frame 2) for 1 h. (B) GFP-CT (50 μg/ml) at 4°C (frame 1) and at 37°C (frame 2) for 1 h. (C) RFP-CT (50 μg/ml) at 4°C (frame 1) and at 37°C (frame 2) for 1 h.
