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Atomic model of the VipA/VipB, the type six secretion system contractile sheath of Vibrio cholerae from cryo-EM
Sample Vibrio cholerae VipA/VipB sheath in a contracted state Sample Components VipA VipB
Specimen Preparation Sample Aggregation State FILAMENT Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details Plunged into liquid ethane (FEI VITROBOT MARK IV)
3D Reconstruction Reconstruction Method HELICAL Number of Particles 96000 Reported Resolution (Å) 3.5 Resolution Method Other Details Refinement Type Symmetry Type HELICAL Axial Symmetry C6 Axial Rise 21.8 Angular Rotation 29.4
Data Acquisition Detector Type GATAN K2 (4k x 4k) Electron Dose (electrons/Å**2) 30
Imaging Experiment 1 Date of Experiment 2013-11-15 Temperature (Kelvin) 63 Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 400 Maximum Defocus (nm) 2000 Minimum Tilt Angle (degrees) -5 Maximum Tilt Angle (degrees) 5 Nominal CS 2.7 Imaging Mode BRIGHT FIELD Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification 29000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version CTF CORRECTION CTFFIND PARTICLE SELECTION Helixboxer RECONSTRUCTION IHRSR RECONSTRUCTION SPIDER
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details Phase Flip, CTF detection by CTFFIND