Extended Data Fig. 4: Resolution assessment of cryo-EM structures.

a, Global resolution assessment by Fourier shell correlation at the 0.143 criterion. b, Correlations of model vs map by Fourier shell correlation (FSC) at the 0.5 criterion. c-g, Local resolution maps for all structures calculated using RELION. h, Representative densities of the R1-32 epitopes and R1-32 HCDR loops in the focused refinement map. R1-32 HCDRs, LCDRs and RBD are colored in magenta, purple and cyan, respectively.