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Three-dimensional representation of SARS-CoV-2 spike protein reporting residues characterizing the five variants of concern (VOCs). The protein is shown as a gray cartoon. The Alpha B.1.1.7, Beta B.1.351, Gamma P.1, Delta B.1.617.2 + AY.X, and Omicron B.1.1.529 VOCs are represented as magenta, yellow, cyan, forest green, and blue spheres, respectively. The shared mutated residues present in at least two VOCs are reported as red spheres.
