ELECTRON MICROSCOPY

Sample

spinach 70S chloro-ribosome

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details 5 microliters applied to the grid then blotted for 3 seconds with Whatman number 1 filter paper before plunging in liquid ethane.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 86370
Reported Resolution (Å) 9.4
Resolution Method ?
Other Details An 11.5 A E.coli 70S ribosome map was used as initial reference and then resulting 18 A map from reconstruction of 70S chloro-ribosome was used as a reference for iterative refinement
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 program O
Overall B Value ?
Fitting Procedure ?
Details METHOD--Cross-Correlation based manual fitting in O REFINEMENT PROTOCOL--Rigid Body
Data Acquisition
Detector Type KODAK SO-163 FILM
Electron Dose (electrons/Å2) 20
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TECNAI F20
Minimum Defocus (nm) 700
Maximum Defocus (nm) 3500
Minimum Tilt Angle (degrees) 0
Maximum Tilt Angle (degrees) 0
Nominal CS 2
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 50000
Calibrated Magnification 50760
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
. CTF correction for each Micrograph