3JAO

Ciliary microtubule doublet

ELECTRON MICROSCOPY

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Sample
microtubule doublet extracted from Tetrahymena cilia

Specimen Preparation
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	HALF-MAPS REFINED INDEPENDENTLY
Symmetry Type	HELICAL

Map-Model Fitting and Refinement
Id	1 (3J6E)
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/Å**2)	30

Imaging Experiment	1
Date of Experiment	2011-10-25
Temperature (Kelvin)	90
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

EM Software
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