ELECTRON MICROSCOPY

Sample

Subunit A with DARPin Subunit B

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details 2.5 microliter of sample, 0 sec wait, 0 sec drain, 3 sec blot, -15 blot force, grids pre-treated with 0.1% poly-lysine for 6 hours
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 80253
Reported Resolution (Å) 2.9
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details Initial local fitting by Chimera and individual residues refined using phenix.real_space_refine
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 56
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) ?
Maximum Defocus (nm) ?
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 130000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION RELION 2.0
IMAGE ACQUISITION Leginon ?
CTF CORRECTION CTFFIND 4.1.5
MODEL FITTING PHENIX ?
MODEL REFINEMENT PHENIX ?
INITIAL EULER ASSIGNMENT RELION 2.0
FINAL EULER ASSIGNMENT cryoSPARC v.2.4.0
CLASSIFICATION cryoSPARC v.2.4.0
RECONSTRUCTION cryoSPARC v.2.4.0
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING ONLY ?