Extended Data Fig. 2: SARS-CoV-2 variants induce syncytia in S-Fuse cells.
From: Reduced sensitivity of SARS-CoV-2 variant Delta to antibody neutralization

S-Fuse cells were exposed to the indicated SARS-CoV-2 strain (at a MOI of 10−3). The cells become GFP+ when they fuse together. After 20 h, infected cells were stained with anti-spike antibodies and Hoechst to visualize nuclei. Syncytia (green), spike protein (red) and nuclei (blue) are shown. Representative images from three independent experiments are shown. Scale bar, 50 μm.