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Emodin blocks the attachment of SADS-CoV to cells. IPI-FX cells were incubated with SADS-CoV together with Emodin (12.5 μg/ml) or 0.1% DMSO at 4 °C for 2 h. Images were taken using Leica TCS SP8 STED 3X microscopy with a 100 × NA oil-immersion objective. Scale bar, 10 μm.
