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![SARS-CoV-2 (COVID-19) Spike RBD Protein, B.1.1.529 / Omicron variant, His tag protein (GTX136716-pro) were separated by 12% SDS-PAGE, and the membrane was blotted with the SARS-CoV-2 (COVID-19) Spike RBD antibody [HL257] (GTX635692) diluted at 1:5000.](https://www.genetex.com/upload/website/prouct_img/normal/GTX635692/GTX635692_44249_20211223_WB_SARScoronavirus2_Ag_21122323_262.jpg)
![Indirect ELISA analysis performed by coating plate with recombinant SARS-CoV-2 (COVID-19) Spike RBD Protein, B.1.1.529 / Omicron variant, His tag (GTX136716-pro) (159.36-2.49 nM). Coated protein was probed with SARS-CoV-2 (COVID-19) Spike RBD antibody [HL1002] (GTX635791) (1 μg/mL). Goat anti-rabbit IgG antibody (HRP) (GTX213110-01) (1:10000) was used to detect bound primary antibody.](https://www.genetex.com/upload/website/prouct_img/normal/GTX635791/GTX635791_44333_20211229_ELISA_Indirect_22010301_733.jpg)
![Indirect ELISA analysis performed by coating plate with recombinant Spike ECD protein(s) derived from different strains of SARS-CoV-2 virus (ie., Wild type; B1.617.2 delta variant) (29.71-0.46 nM). Coated protein was probed with SARS-CoV-2 (COVID-19) Spike RBD antibody [HL1003] (GTX635792) (1 μg/mL). Goat anti-rabbit IgG antibody (HRP) (GTX213110-01) (1:10000) was used to detect bound primary antibody.](https://www.genetex.com/upload/website/prouct_img/normal/GTX635792/GTX635792_44368_20210910_ELISA_Indirect_21092401_381.jpg)
![Sandwich ELISA detection of recombinant Spike RBD Protein(s) derived from different strains of SARS-CoV-2 virus (ie., Wild type; B.1.1.529 Omicron variant) using antibodies as below.<br>Capture: SARS-CoV-2 (COVID-19) Spike RBD antibody [HL1014] (GTX635807) (5 μg/mL)<br>Detection: SARS-CoV-2 (COVID-19) Spike RBD antibody [HL1002] (HRP) (GTX635791-01) (1 μg/mL)](https://www.genetex.com/upload/website/prouct_img/normal/GTX635807/GTX635807_44396_20211230_ELISA_PAIR_21123001_596.jpg)
![SARS-CoV-2 (COVID-19) Spike ( L18F,..., K417N, E484K, N501Y,...)(ECD) Protein, His tag (active) (GTX136061-pro, 0.2 microg) was separated by 12% SDS-PAGE, and the membrane was blotted with SARS-CoV-2 (COVID-19) Spike S2 antibody [HL1038] (GTX635910) diluted at 1:150000. The HRP-conjugated anti-rabbit IgG antibody (GTX213110-01) was used to detect the primary antibody.](https://www.genetex.com/upload/website/prouct_img/normal/GTX635910/GTX635910_44048_20210319_WB_SARScoronavirus2_Ag_21032603_608.jpg)
![SARS-CoV-2 (COVID-19) Spike ( L18F,..., K417N, E484K, N501Y,...)(ECD) Protein, His tag (active) (GTX136061-pro, 0.2 microg) was separated by 12% SDS-PAGE, and the membrane was blotted with SARS-CoV-2 (COVID-19) Spike S2 / S2 antibody [HL1039] (GTX635911) diluted at 1:140000. The HRP-conjugated anti-rabbit IgG antibody (GTX213110-01) was used to detect the primary antibody.](https://www.genetex.com/upload/website/prouct_img/normal/GTX635911/GTX635911_44048_20210319_WB_SARScoronavirus2_Ag_21040521_104.jpg)