3C9K
Model of Histone Octamer Tubular Crystals
ELECTRON MICROSCOPY
| Sample |
|---|
| Histone Octamer Tubular Crystal |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | FILAMENT |
| Vitrification Instrument | |
| Cryogen Name | |
| Sample Vitrification Details | Negative Stain 0.2% Uranyl Acetate |
| Staining Type | NEGATIVE |
| Staining Material | Uranyl Acetate |
| Staining Details | |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | HELICAL |
| Number of Particles | 3500 |
| Reported Resolution (Å) | 20 |
| Resolution Method | |
| Other Details | 11-fold rotational symmetry imposed during backprojection |
| Refinement Type | |
| Symmetry Type | HELICAL |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (2HIO) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | RIGID BODY FIT | ||||
| Refinement Target | Cross-correlation and van der Waals energy | ||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | METHOD--Because of the helical line group, the dyad axis is constrained to lie facing the helical axis and reduces the search to rotations and transl ... | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | KODAK SO-163 FILM | ||||||||
| Electron Dose (electrons/Å**2) | 100 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | 295 |
| Microscope Model | ZEISS LEO912 |
| Minimum Defocus (nm) | 1000 |
| Maximum Defocus (nm) | 800 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | |
| Nominal Magnification | 50000 |
| Calibrated Magnification | |
| Source | TUNGSTEN HAIRPIN |
| Acceleration Voltage (kV) | 120 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| RECONSTRUCTION | SPIDER | |
