Resolution of the EM map and accuracy of model building. (A) Fourier shell correlation curve. According to the 0.5 forward scatter (FSC) criteria, the resolution of the final EM map is ∼15 Å. (B) Accuracy of LF docking in the EM map. Blue corresponds to low RMSD (0.85 Å) and red to high RMSD (4.39 Å). The overall average RMSD is 2.48 Å.