ELECTRON MICROSCOPY

Sample

microtubule doublet extracted from Tetrahymena cilia

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument FEI VITROBOT MARK II
Cryogen Name ETHANE
Sample Vitrification Details Blot for 3 seconds in humid air atmosphere before plunging into liquid ethane (FEI VITROBOT MARK II).
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 10700
Reported Resolution (Å) 23
Resolution Method FSC 0.143 CUT-OFF
Other Details gold standard
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target Cross-correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details METHOD--kinesin binding, gradient density map analysis, and cross-correlation coefficient. The fitting for protofilament A10 as represented by BIOMT records 51-55 is ambiguous as it has been assigned using only the cross-correlation coefficient. REFINEMENT PROTOCOL--RIGID BODY DETAILS--rigid body fitting of individual dimers
Data Acquisition
Detector Type GENERIC CCD
Electron Dose (electrons/Å2) 30
Imaging Experiment
Date of Experiment 2011-10-25
Temprature (Kelvin)
Microscope Model FEI TECNAI F20
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 4000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 1.5
Imaging Mode BRIGHT FIELD
Specimen Holder Model GATAN LIQUID NITROGEN
Nominal Magnification 67000
Calibrated Magnification 67000
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL FITTING UCSF Chimera ?
RECONSTRUCTION SPIDER ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. each particle
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