Figure 1 Immunohistochemistry Validation of SARS-CoV-2 (COVID-19) Spike S2 in COVID-19 Patient Lung
Immunohistochemical analysis of paraffin-embedded COVID-19 patient lung tissue using anti- SARS-CoV-2 (COVID-19) Spike S2 antibody (0.1 μg/mL). Tissue was fixed with formaldehyde and blocked with 10% serum for 1 h at RT; antigen retrieval was by heat mediation with a citrate buffer (pH6). Samples were incubated with primary antibody overnight at 4˚C. A goat anti-rabbit IgG H&L (HRP) at 1/250 was used as secondary. Counter stained with Hematoxylin. Strong signal of SARS-COV-2 spike protein was observed in macrophage of COVID-19 patient lung, but not in non-COVID-19 patient lung.
Figure 2 ELISA Validation with SARS-CoV-2 (COVID-19) Spike S2 ECD Recombinant Protein
Antibodies: SARS-CoV-2 (COVID-19) Spike S2 antibody, 9123. A direct ELISA was performed using SARS-CoV-2 (COVID-19) Spike S2 ECD recombinant protein (10-115) as coating antigen and the anti-SARS-CoV-2 (COVID-19) Spike S2 antibody as the capture antibody. Secondary: Goat anti-rabbit IgG HRP conjugate at 1:20000 dilution. Detection range is from 8 ng/mL to 1000ng/mL.
Figure 3 Western Blot Validation with SARS-CoV-2 (COVID-19) Spike S2 ECD Recombinant Protein
Loading: 30 ng per lane of SARS-CoV-2 (COVID-19) Spike S2 ECD recombinant protein, 10-115. Antibodies: SARS-CoV-2 (COVID-19) Spike S2, 9123, 1h incubation at RT in 5% NFDM/TBST. Secondary: Goat anti-rabbit IgG HRP conjugate at 1:10000 dilution. Lane 1: 1 μg/mL and Lane 2: 2 μg/mL.
Figure 4 Overexpression Validation in Spike Transfected 293 Cells
Loading: 10 μg per lane of Spike transfected 293 cell lysate. Antibodies: SARS-CoV-2 (COVID-19) Spike, 9123, 1h incubation at RT in 5% NFDM/TBST. Secondary: Goat anti-rabbit IgG HRP conjugate at 1:10000 dilution. Lane 1: 1 μg/mL and Lane 2: 2 μg/mL