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. 2021 Jun 7;595(7866):278–282. doi: 10.1038/s41586-021-03676-z

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Extended Data Fig. 7 — a, A representative cryo-EM micrograph showing Nb12–spike complex embedded in vitreous ice. b, A contrast-transfer function (CTF) fit of the micrograph. c, Representative 2D average classes. d, Overall resolution estimation (Fourier shell correlation (FSC) of 0.143). e, Local resolution estimation of the cryo-EM map. f, Cryo-EM density and models for an interface region between RBD and Nb12 after local refinement.