ELECTRON MICROSCOPY

Sample

E. coli 70S-fMetVal-tRNAVal-tRNAfMet complex

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details Manual blotting for about 2 seconds prior to plunging into liquid ethane (custom-built CEVS vitrification instrument with dew point temperature adjusted to 18 degrees C)
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 14235
Reported Resolution (Å) 12
Resolution Method FSC 0.5 CUT-OFF
Other Details Final maps were calculated from 13 datasets acquired at different time points, computationally sorted into distinct substates.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target Cross-correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details METHOD--Cross-correlation gradient based REFINEMENT PROTOCOL--flexible fitting, dynamic elastic network
Data Acquisition
Detector Type GENERIC TVIPS (4k x 4k)
Electron Dose (electrons/Å2) 20
Imaging Experiment
Date of Experiment 2008-05-11
Temprature (Kelvin)
Microscope Model FEI/PHILIPS CM200FEG
Minimum Defocus (nm) 500
Maximum Defocus (nm) 2000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Specimen Holder Model GATAN LIQUID NITROGEN
Nominal Magnification 161000
Calibrated Magnification 162740
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 160
Imaging Details Objective lens astigmatism was corrected at 200,000 times magnification
Imaging Experiment
Task Software Package Version
MODEL FITTING DireX ?
RECONSTRUCTION Custom ?
RECONSTRUCTION IMAGIC ?
RECONSTRUCTION SPIDER ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
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