Bundle of five different SARS-CoV-2 S1 (RBD) Mutants, GFP/His-Tag SARS-CoV-2 (COVID-19) Spike S1 Protein (RBD), GFP/His-Tag (P2020-031) SARS-CoV-2 S1 (RBD) Alpha, B.1.1.7 (UK), GFP/His-Tag (P2020-041) SARS-CoV-2 S1 (RBD) Delta B.1.617.2 (India), GFP/His-Tag (P2020-049) SARS-CoV-2 S1 (RBD) Omicron B.1.1.529, BA.1, GFP/His-Tag (P2020-061) SARS-CoV-2 S1 (RBD) Omicron B.1.1.529, BA.2, GFP/His-Tag (P2020-062) Order the bundle and save 20%! Several fast-spreading SARS-CoV-2 virus variants have emerged due to various mutations with the most important being located in the Spike S1 RBD protein domain. These mutations are dangerous as they result in a significant higher transmissibility of the SARS-CoV-2 virus compared to the original wildtype virus and may also have a dramatic impact on the efficacy of existing vaccines. WHO has published a list with specific SARS-CoV-2 Variants of Interest (VOIs) and Variants of Concern (VOCs) in order to prioritise global monitoring and research, and ultimately to inform the ongoing response to the COVID-19 pandemic. We offer a bundle of the SARS-CoV-2 S1 (RBD) Wildtype (SARS-CoV-2 (COVID-19) Spike S1 Protein (RBD), GFP/His-Tag) and four Variants of Concern (SARS-CoV-2 S1 (RBD) Alpha, B.1.1.7 (UK), GFP/His-Tag, SARS-CoV-2 S1 (RBD) Delta B.1.617.2 (India), GFP/His-Tag, SARS-CoV-2 S1 (RBD) Omicron B.1.1.529, BA.1, GFP/His-Tag, SARS-CoV-2 S1 (RBD) Omicron B.1.1.529, BA.2, GFP/His-Tag).