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Structure of uncleaved Influenza A/Victoria/2570/2019 Haemagglutinin. The 2021 Influenza A(H1N1)pdm09 egg-derived vaccine candidate.
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details in silico model SwissModel
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 163054 Reported Resolution (Å) 3.68 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C3
Map-Model Fitting and Refinement Id 1 Refinement Space REAL Refinement Protocol AB INITIO MODEL Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type DIRECT ELECTRON APOLLO (4k x 4k) Electron Dose (electrons/Å**2) 68
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model JEOL CRYO ARM 300 Minimum Defocus (nm) 1000 Maximum Defocus (nm) 2500 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION Topaz MODEL FITTING ISOLDE 1.6 MODEL REFINEMENT PHENIX 1.21.1_5286: RECONSTRUCTION RELION 4.0.1
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION