SARS-CoV-2 (COVID-19) spike antibody detects 6X His-tagged SARS-CoV-2 (COVID-19) spike (S1) protein by immunohistochemical analysis. Sample: Paraffin-embedded SARS-CoV-2 (COVID-19) Spike (S1) FFPE Cell Pellet Block (GTX435643). Green: 6X His-tagged SARS-CoV-2 (COVID-19) spike (S1) protein stained by SARS-CoV-2 (COVID-19) spike antibody (GTX135356) diluted at 1:1000. Red: 6X His-tagged SARS-CoV-2 (COVID-19) spike (S1) protein stained by 6X His tag antibody [GT359] (GTX628914) diluted at 1:1000. Blue: Fluoroshield with DAPI (GTX30920). Antigen Retrieval: Citrate buffer, pH 6.0, 15 min