ELECTRON MICROSCOPY

Sample

Heterodimer human GABA(B) receptor composed of GABA(B1b) and GABA(B2) subunits.

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE-PROPANE
Sample Vitrification Details blot for 4 seconds before plunging
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 233737
Reported Resolution (Å) 3.3
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 85
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) -500
Maximum Defocus (nm) -2000
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 130000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Preliminary grid screening was performed manually.
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION RELION 3.0
IMAGE ACQUISITION Leginon ?
CTF CORRECTION Gctf 1.06
MODEL FITTING Coot 0.8.9.0
MODEL REFINEMENT PHENIX 1.14
INITIAL EULER ASSIGNMENT cryoSPARC 2
FINAL EULER ASSIGNMENT cryoSPARC 2
RECONSTRUCTION cryoSPARC 2
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?