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Locally refined protomer structure of native-form oocyte/egg Alpha-2-Macroglobulin (A2Moo) tetramer
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 11.107 f_angle_d 0.667 f_chiral_restr 0.049 f_plane_restr 0.006 f_bond_d 0.004
Sample nucleosome isolated from metaphase chromosome formed in Xenopus egg extract (oligo fraction)
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 195292 Reported Resolution (Å) 3.65 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT
Map-Model Fitting and Refinement Id 1 Refinement Space Refinement Protocol Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) GATAN K2 SUMMIT (4k x 4k) GATAN K2 SUMMIT (4k x 4k) GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 33.11 38.34 35.27 34.2
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TALOS ARCTICA Minimum Defocus (nm) Maximum Defocus (nm) Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 200 Imaging Details
EM Software Task Software Package Version MODEL FITTING UCSF Chimera FINAL EULER ASSIGNMENT cryoSPARC 3.2.0 CLASSIFICATION cryoSPARC 3.2.0 RECONSTRUCTION cryoSPARC 3.2.0 MODEL REFINEMENT PHENIX 1.19.2
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION