ELECTRON MICROSCOPY

Sample

heavy meromyosin subfragment of Chick smooth muscle Myosin with regulatory light chain in phosphorylated state

Specimen Preperation
Sample Aggregation State 2D ARRAY
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details Carried out in cold room at 4 degrees C
3D Reconstruction
Reconstruction Method CRYSTALLOGRAPHY
Number of Particles ?
Reported Resolution (Å) 20
Resolution Method ?
Other Details A total of 85 unique averaged structure factors were obtained and had an average phase residual of 17.9 degrees with a resolution to approx 2.1 nm
Refinement Type
Symmetry Type 2D CRYSTAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details REFINEMENT PROTOCOL--RIGID BODY DETAILS--The model was roughly fit into the density map using O the refined using NMFF. The entire structure was then minimized using minCHARMM.pl
Data Acquisition
Detector Type KODAK SO-163 FILM
Electron Dose (electrons/Å2) 40
Imaging Experiment
Date of Experiment 2004-10-10
Temprature (Kelvin)
Microscope Model FEI/PHILIPS CM300FEG/T
Minimum Defocus (nm) 4000
Maximum Defocus (nm) ?
Minimum Tilt Angle (degrees) -60
Maximum Tilt Angle (degrees) 60
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model GATAN LIQUID NITROGEN
Nominal Magnification 24000
Calibrated Magnification ?
Source TUNGSTEN HAIRPIN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL FITTING CCP4 ?
MODEL FITTING NMFF ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. determined using ICE anc corrected with CTFAPPPLY