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. 2023 Jun 7;9(23):eadg0330. doi: 10.1126/sciadv.adg0330

Table 2. Cryo-EM data collection and image processing statistics for S2D14.

EMDB, Electron Microscopy Data Bank; PDB, Protein Data Bank; RMSD, root mean square deviation.

Data collection
Microscope Glacios TitanKrios
Voltage (kV) 200 300
Detector Falcon 3 Falcon 4
Magnification 120,000 120,000
Pixel size (Å/pixel) 0.91 0.67
Exposure (e/Å2) 48 43
No. of frames 50 42
Defocus range (μm) 0.75–2.5 0.8–2.2
Software EPU EPU
Total micrographs 1425 6169
Data processing
Particles extracted 92,933 724,002
After 2D classification 44,459 566,825
3-RBD down 1-RBD open 3-RDB down 2-RBD exposed 2-RBD open
Particles in refinement 7759 9154 33,173 47,773 87,614
Symmetry C3 C1 C3 C1 C1
Map sharpening B-factor −389.99 −592.139 −17.18 −5.35 −7.2
Unmasked resolution at 0.5/0.143 FSC (Å) 10/7.5 13/9.1 4.2/3.5 7.9/4.1 7.3/3.9
Masked resolution at 0.5/0.143 FSC (Å) 8.1/7.1 9.0/8.5 3.3/2.8 3.9/3.3 3.7/3.1
PDB ID 8EPN 8EPQ 8EPP
EMDB ID 28531 28533 28532
Model statistics
MolProbity score 1.50 1.60 1.67
Clash score 6.70 7.20 7.58
Composition
 Amino acids 2991 2984 2939
 Glycans 126 66 66
RMSD bonds (Å) 0.003 0.003 0.002
RMSD angles (°) 0.579 0.609 0.491
C-beta outliers (%) 0.00 0.00 0.00
CC (mask) 0.87 0.81 0.84
Rotamer outliers (%) 0.84 0.12 0.35
Ramachandran plot
 Favored (%) 97.34 96.75 96.21
 Allowed (%) 2.66 3.21 3.65
 Disallowed (%) 0.00 0.03 0.14