ELECTRON MICROSCOPY

Sample

Thermus thermophilus ribosome complexed with mRNA, tRNAs and EF-Tu

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK I
Cryogen Name METHANE
Sample Vitrification Details A Vitrobot was used to shock-freeze the sample in liquid methane.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 323688
Reported Resolution (Å) 6.4
Resolution Method ?
Other Details The SPIDER software package was used.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target best visual fit using the programs O, CHIMERA or PYMOL.
Overall B Value ?
Fitting Procedure ?
Details REFINEMENT PROTOCOL--rigid body docking carried out with SPIDER or SITUS software.
Data Acquisition
Detector Type KODAK SO-163 FILM
Electron Dose (electrons/Å2) 23
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI POLARA 300
Minimum Defocus (nm) 1500
Maximum Defocus (nm) 4500
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 39000
Calibrated Magnification ?
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
. CTF correction of each defocus group volume prior to back projection.