Science · Built from a recipe
Cryo-EM Map
C4 on the minor comb. Its drum rings at 277.7 Hz.
Cryo-electron microscopy freezes thousands of copies of a molecule in thin ice, photographs them with electrons and averages the pictures into a 3D map of density.
- Shelf
- Science
- Kind
- Built from a recipe
- Your own
- About this map
- Sound
- Yes
- Licenses
- Public domain
Its note
Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 277.7 Hz, 103 cents sharp of C4, the nearest tine on the comb. The next fifteen are its overtones, and each one draws its own figure: sand gathers on the lines that stay still.
- 1278 Hz
- 2441 Hz
- 3443 Hz
- 4584 Hz
- 5601 Hz
- 6635 Hz
- 7731 Hz
- 8738 Hz
- 9806 Hz
- 10810 Hz
- 11871 Hz
- 12877 Hz
- 13952 Hz
- 14980 Hz
- 15997 Hz
- 161009 Hz
How to play
Tap to cut it open; tap again to close it. Pick a map, a level and the fitted model in the Splash tab.
Its controls
| Control | Kind | Range | Start |
|---|---|---|---|
| Cut it open | Tap | ||
| Cut it open | Switch | Off | |
| Map | List | 3 choices | Apoferritin (2.6 Å) |
| Level | List | 3 choices | EMDB's recommended |
| Color by | List | 4 choices | What suits it |
| Fitted atomic model | Setting |
About it
Cryo-electron microscopy freezes thousands of copies of a molecule in thin ice, photographs them with electrons and averages the pictures into a 3D map of density. Scientists look at the map as a surface at one density level and build an atomic model into it.
This splash reads three real maps from the Electron Microscopy Data Bank: apoferritin, a ribosome and a virus shell. It draws the surface at the level EMDB recommends, one small flat splat wherever the density crosses that level, on a grid of about 1 to 1.6 Å voxels that fits a phone. Choose a lower or higher level, color by the fitted model's chains or by distance from the center, and show the model's backbone inside a see-through map. Tap to cut the front half away and see inside. It is for looking, not for measuring or model building.
Sources and credits
| Work | By | License |
|---|---|---|
| Mouse heavy-chain apoferritin by cryo-EM at 100 keV, 2.6 Å (EMD-17961), with its fitted model (PDB 8PVC) | G. McMullan, K. Naydenova, D. Mihaylov et al. (PNAS 120, e2312905120, 2023), via EMDB and the PDB | Public domain (EMDB: free of all copyright restrictions) |
| Arbekacin-bound E. coli 70S ribosome, 3.2 Å (EMD-48329), with its fitted model (PDB 9MKK) | S. Majumdar, N. P. Parajuli, X. Ge, A. Emmerich and S. Sanyal (Scientific Reports 15, 18271, 2025), via EMDB and the PDB | Public domain (EMDB: free of all copyright restrictions) |
| AAV2 virus-like particle, 3.02 Å (EMD-20610), with its fitted model (PDB 6U0V) | M. Agbandje-McKenna and A. Bennett (deposited 2019), via EMDB and the PDB | Public domain (EMDB: free of all copyright restrictions) |
