ELECTRON MICROSCOPY

Sample

Photosystem I from Chlamydomonas reinhardtii with bound ferredoxin.

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details 2.6 microliter of sample were applied to cryo-grids and blotted for 3.5 seconds using Whatman #1 before plunge freezing.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 48941
Reported Resolution (Å) 4.9
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 RIGID BODY FIT
Refinement Target Correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type FEI FALCON II (4k x 4k)
Electron Dose (electrons/Å2) 91
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1250
Maximum Defocus (nm) 2500
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 75000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Preliminary grid screening was performed manually using a JEOL JEM-3000SFF microscope.
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION EPU ?
CTF CORRECTION Gctf ?
MODEL FITTING UCSF Chimera ?
MODEL FITTING Coot ?
MODEL REFINEMENT PHENIX ?
INITIAL EULER ASSIGNMENT cryoSPARC 2
FINAL EULER ASSIGNMENT cryoSPARC 2
CLASSIFICATION cryoSPARC 2
RECONSTRUCTION cryoSPARC 2
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING ONLY ?