ELECTRON MICROSCOPY

Sample

Heptamer of C-terminal 63-kDa fragment of anthrax toxin protective antigen, pore conformation

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Plunged into liguid nitrogen (FEI VITROBOT MARK IV).
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 60455
Reported Resolution (Å) 2.9
Resolution Method FSC 0.143 CUT-OFF
Other Details (Single particle--Applied symmetry: C7)
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 (4k x 4k)
Electron Dose (electrons/Å2) 30
Imaging Experiment
Date of Experiment 2014-01-08
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1800
Maximum Defocus (nm) 5100
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 22500
Calibrated Magnification 39062
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. Each particle
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