ELECTRON MICROSCOPY

Sample

CheA2-trimer core complex

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details Single-sided blotting (to avoid disruption of the monolayer) before plunging into liquid ethane
3D Reconstruction
Reconstruction Method TOMOGRAPHY
Number of Particles 4000
Reported Resolution (Å) 12.7
Resolution Method FSC 0.143 CUT-OFF
Other Details Gold-standard refinement
Refinement Type
Symmetry Type 2D CRYSTAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details REFINEMENT PROTOCOL--FLEXIBLE
Data Acquisition
Detector Type GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å2) 60
Imaging Experiment
Date of Experiment 2009-01-07
Temprature (Kelvin)
Microscope Model FEI POLARA 300
Minimum Defocus (nm) 4000
Maximum Defocus (nm) 8000
Minimum Tilt Angle (degrees) -70
Maximum Tilt Angle (degrees) 70
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Specimen Holder Model OTHER
Nominal Magnification 39000
Calibrated Magnification 49834
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. TomoCTF (strip-based periodogram)
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