ELECTRON MICROSCOPY Experimental Data



EM Sample
Sample pH 7.5
Sample Vitrification Details POLIOVIRUS WAS INCUBATED WITH CD155-AP FOR 1 HOURS AT 4 DEGREES CELSIUS (277 KELVIN) USING A EIGHT-FOLD EXCESS OF CD155-AP FOR EACH OF THE SIXTY POSSIBLE BINDING SITES PER VIRION. AFTER INCUBATION, SAMPLES WERE PREPARED AS THIN LAYERS OF VITREOUS ICE AND MAINTAINED AT NEAR LIQUID NITROGEN TEMPERATURE IN THE ELECTRON MICROSCOPE WITH A GATAN 626 CRYOTRANSFER HOLDER.
Sample Aggregation State PARTICLE
EM Data Acquisition
Date of Experiment 1999-06-01
Num of Micrographs-Images Used --
Temperature (Kelvin) 120.0
Microscope Model PHILLIPS CM200 FEG
Detector Type KODAK SO163 FILM
Minimum Defocus (nm) 1300.0
Maximum Defocus (nm) 2100.0
Minimum Tilt Angle (degrees) --
Maximum Tilt Angle (degrees) --
Nominal CS --
Imaging Mode --
Electron Dose (electrons nm**-2) 20.0
Illumination Mode --
Nominal Magnification 38000
Calibrated Magnification --
Source --
Acceleration Voltage (kV) 80
Imaging Details --
3D Reconstruction
Software Package(s)
Reconstruction Method COMMON-LINES AND POLAR-FOURIER-TRANSFORM FULLER ET AL. 1996, J.STRUC.BIOL.c 116, 48-55; BAKER AND CHENG, 1996, J.STRUC.BIOL. 116, 120-130
EM Image Reconstruction Statistics
Number of Particles 1156
Actual Pixel Size 3.68
Effective Resolution 22.0
EM Reconstruction Magnification Callibration THE PIXEL SIZE OF THE CRYO-EM MAP WAS CALIBRATED AGAINST A LOW RESOLUTION DENSITY MAP CALCULATED FROM THE CRYSTAL STRUCTURE OF POLIOVIRUS. DENSITIES WERE COMPARED BY CROSS- CORRELATION WITHIN A SPHERICAL SHELL OF INTERNAL RADIUS 110 ANGSTROMS AND EXTERNAL RADIUS OF 145 ANGSTROMS.
EM Map-Model Fitting and Refinement
Refinement Space Refinement Protocol Refinement Target Overall B Value Fitting Procedure Fitting Software
REAL MANUAL ADJUSTMENT VISUAL AGREEMENT -- MANUAL --