Fig. 2: Binding and neutralization of the Omicron variant by bispecific antibodies.

a Schematic diagrams showing the structures of bispecific antibodies. b SDS-PAGE and cross-linking SDS-PAGE gels showing the sizes of the representative bispecific antibodies and their parental antibodies. c Binding specificities of the bispecific antibodies to the SARS-CoV-2 RBD-His, Omicron trimer-His, or RBD-His protein. d Binding affinities of the bispecific antibodies to the SARS-CoV-2 RBD-His, Omicron trimer-His, or RBD-His protein were measured by BLI experiments. ND represents not determined. e Neutralization by bispecific antibodies against the SARS-CoV-2 VOCs, including Omicron, BA.2, and sarbecoviruses. f Neutralization of bispecific antibodies against authentic BA.1.1 virus.