ELECTRON MICROSCOPY

Sample

70S-fMet-tRNAiMet-IF2-GDPNP complex: Initiation Complex I

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK I
Cryogen Name ETHANE
Sample Vitrification Details Blot for 2-4 seconds before plunging into liquid ethane (FEI VITROBOT MARK I).
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 14872
Reported Resolution (Å) 4.6
Resolution Method FSC 0.143 CUT-OFF
Other Details Final maps were calculated from two combined datasets. To avoid overfitting, the data were refined in a resolution-limited scheme using SPIDER.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID
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) 20
Imaging Experiment
Date of Experiment 2013-08-28
Temprature (Kelvin)
Microscope Model FEI POLARA 300
Minimum Defocus (nm) 640
Maximum Defocus (nm) 7180
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 31000
Calibrated Magnification 39000
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
CTF CORRECTION CTFFIND 4
RECONSTRUCTION EMAN 2
RECONSTRUCTION SPARX ?
RECONSTRUCTION SPIDER ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. CTFFIND4
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