ELECTRON MICROSCOPY

Sample

DENGUE VIRUS

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument ?
Cryogen Name ?
Sample Vitrification Details SAMPLES WERE PREPARED AS THIN LAYERS OF VITREOUS ICE AND MAINTAINED AT LIQUID NITROGEN TEMPERATURE IN THE ELECTRON MICROSCOPE
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 1691
Reported Resolution (Å) 9.5
Resolution Method ?
Other Details THE RECONSTRUCTION WAS COMPUTED FROM 1691 DENGUE VIRUS IMAGES THAT WERE SELECTED FROM 78 MICROGRAPHS. ORIENTATIONS WERE DETERMINED BY THE MODEL-BASED POLAR-FOURIER TRANSFORM METHOD (BAKER AND CHENG, 1996, J.STRUC.BIOL. 116,120-130) AND REFINED BY THE MODEL-BASED FOURIER TRANSFORM REFINEMENT PROCEDURE(http://bond.cs.ucf.edu/ComputationalBiology/Projects/POR/Home.html).
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol ?
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type KODAK SO-163 FILM
Electron Dose (electrons/Å2) 27
Imaging Experiment
Date of Experiment 2000-06-27
Temprature (Kelvin)
Microscope Model FEI/PHILIPS CM200T
Minimum Defocus (nm) 800.0
Maximum Defocus (nm) 4800.0
Minimum Tilt Angle (degrees) 0.0
Maximum Tilt Angle (degrees) 0.0
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 50000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL FITTING EMfit ?
RECONSTRUCTION EM3DR ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. each viral image was CTF corrected before reconstruction, based on the following equation: F(corr)=F(obs)/[|CTF|+wiener*(1-|CTF|)]