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Figure 1 Immunohistochemistry Validation of SARS-CoV-2 (COVID-19) NSP8 in COVID-19 Patient Lung Immunohistochemical analysis of paraffin-embedded COVID-19 patient lung tissue using anti- SARS-CoV-2 (COVID-19) NSP8 antibody (9159, 0.5 &956,g/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&730,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 NSP8 protein was observed in macrophage of COVID-19 patient lung, but not in non-COVID-19 patient lung. |