ELECTRON MICROSCOPY

Sample

Tobacco mosaic virus

Specimen Preperation
Sample Aggregation State HELICAL ARRAY
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Quantifoil 400 mesh copper grids R 1.2/1.3 were used (Quantifoil Micro Tools GmbH, Jena, Germany). Grids were glow discharged in air at a pressure of 2.2x10-2 Torr for 2 min at medium power with a Harrick Plasma cleaner (PDC-002). Subsequently, 3-4 ul of the sample was pipetted onto the glow discharged grids and plunge frozen in liquid Ethane with a Vitrobot IV (FEI). The sample chamber of the Vitrobot was maintained at 4C and 100% humidity. Wait time between sample application and blotting was 45 s, the drain time 0 s, the blot time 3 s and the blot force 0.
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 91927
Reported Resolution (Å) 2.3
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space RECIPROCAL
Refinement Protocol AB INITIO MODEL
Refinement Target ?
Overall B Value 105
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type FEI FALCON III (4k x 4k)
Electron Dose (electrons/Å2) 55
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 1800
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 75000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION RELION 3.0
IMAGE ACQUISITION EPU ?
CTF CORRECTION RELION ?
MODEL FITTING Warp 8.0
MODEL REFINEMENT Warp 8.0
INITIAL EULER ASSIGNMENT RELION ?
FINAL EULER ASSIGNMENT RELION 3.0
CLASSIFICATION RELION 3.0
RECONSTRUCTION RELION 3.0
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
Feedback Form
Name
Email
Institute
Feedback