7UT9

ELECTRON MICROSCOPY

Sample

Azotobacter vinelandii nitrogenase complex (1:1 FeP:MoFeP, ATP/ADP-bound) during catalytic N2 reduction

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE-PROPANE
Sample Vitrification Details Custom manual plunger. Greater than 95% humidity.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 48293
Reported Resolution (Å) 2.44
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 RIGID BODY FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 65
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS KRIOS
Minimum Defocus (nm) 1200
Maximum Defocus (nm) 2000
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 135000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION EPU 2.8
CTF CORRECTION CTFFIND 4.1
MODEL FITTING PHENIX ?
MODEL REFINEMENT PHENIX ?
MODEL REFINEMENT Coot ?
INITIAL EULER ASSIGNMENT RELION 4.0/beta2
FINAL EULER ASSIGNMENT RELION 4.0/beta2
CLASSIFICATION cryoSPARC 3.32
RECONSTRUCTION cryoSPARC 3.3.2
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING ONLY ?