Journal: NPJ Vaccines
Article Title: Characterization and immunogenicity of nanoparticle vaccines based on Clade 2 and Clade 3 sarbecovirus S2 proteins
doi: 10.1038/s41541-025-01333-4
Figure Lengend Snippet: a Schematic of S protein and VLP-S2. b SDS-PAGE analysis of individual S2 antigens and VLP-S2s. Characterization by SDS-PAGE was performed twice using different preparations of each sample with similar results. c Representative dynamic light scattering characterization of S2 antigen, MS2, and VLP-S2 constructs. d S2P6 binding characterization of S2 antigens and VLP-S2 constructs (mean ± SD, n = 3), one assay with three technical replicates. e Represenative size exclusion chromography chromatogram of BtKY72 S2 and BtKY72 Tr. S2 antigens, both purified from transfection volumes of 90 mL. f Total yield of protein expected from 1 L of media, extrapolated from separate 50 mL volume expressions (mean ± SD, n = 3). g Melting temperature analysis of BtKY72 S2 and BtKY72 Tr. S2 antigens.
Article Snippet: A plasmid encoding BirA biotin-protein ligase was co-transformed alongside the MS2 plasmid into BL21(DE3) competent E. coli (New England Biolabs) per the manufacturer’s protocol.
Techniques: SDS Page, Construct, Binding Assay, Purification, Transfection