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Mutations in the SARS-CoV-2 spike glycoprotein. NTD, N-terminal domain; RBD, receptor binding domain; FCS, furin cleavage site; FP, fusion peptide; HR1, heptad repeat 1; HR2, heptad repeat 2; TM, transmembrane anchor; IC, intracellular tail. The Delta symbol indicates deletion. Mutations as defined by the Centers for Disease Control and Prevention.
