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SARS-CoV spike protein three-dimensional predicted structure. This representation, shows the trimeric (inset) and monomeric forms of the protein and is based on the three-dimensional predicted model found in the PDB database (PDB entry 1T7G, [109]). Note that the predicted model does not include residues 681-736 of the protein. The S1 and S2 domains as well as the cleavage sites and putative fusion peptide are highlighted.
