ELECTRON MICROSCOPY

Sample

Tobacco Mosaic Virus

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details The sample was plunge-frozen at 4C.
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles ?
Reported Resolution (Å) 4.4
Resolution Method ?
Other Details SIRT algorithm implemented in the SPIDER processing package (command BP RP)
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target Minimization of least-square difference between observed and calculated densities
Overall B Value ?
Fitting Procedure ?
Details METHOD--Torsion angle molecular dynamics REFINEMENT PROTOCOL--Real-space molecular dynamics
Data Acquisition
Detector Type KODAK SO-163 FILM
Electron Dose (electrons/Å2) 15
Imaging Experiment
Date of Experiment 2005-11-22
Temprature (Kelvin)
Microscope Model FEI TECNAI F30
Minimum Defocus (nm) 1.5
Maximum Defocus (nm) 4.0
Minimum Tilt Angle (degrees) 0
Maximum Tilt Angle (degrees) 0
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 59000
Calibrated Magnification 60190
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL FITTING X-PLOR ?
RECONSTRUCTION SPIDER ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. Phase correction and amplitude weighting adapted from Grigorieff 1998(after determination of CTF and specimen tilt)