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. 2021 Jul 23;45:116329. doi: 10.1016/j.bmc.2021.116329

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Fig. 4 — Structural modeling of B.1.1.7 lineage spike receptor-binding domain (RBD). (A) 3D structures of SARS-CoV-2 spike RBD and B.1.1.7 lineage spike RBD. (B) Ramachandran plot of the B.1.1.7 lineage spike RBD structural model.