Fig. 1. Cell isolation, antibody cloning, and candidate panning.
a Isolation strategy of highly potent neutralizing antibodies as depicted by a diagram. b RBD-specific B cells were isolated from convalescent subjects of SARS-CoV-2 infection by fluorescence-activated cell sorting. The 7ADD–/CD19+/CD27+/IgG+/RBD+ gate is shown and highlighted in the boxes. c Statistics of the number of paired antibodies from each subject, as well as the number of kappa and lambda subtypes. d Binding scores of antibody candidates against SARS-CoV-2 RBD as measured by ELISA and scores higher than 2 are presented. 2G1 is highlighted in red. e Candidate panning using a WA1/2020 pseudovirus-based screening model. Antibodies were 10-fold serially diluted from 101 μg/mL to 10−4 μg/mL.