Ramachandran Trajectory Explorer

Load a multi-model PDB trajectory, choose a residue, and click any φ/ψ point to display the corresponding simulation frame.

Drag & drop a PDB file anywhere on this page
No trajectory loaded.

Ramachandran plot

φ / ψ
Load a multi-model PDB trajectory to calculate φ/ψ angles.

Simulation frame

No frame selected
Click a Ramachandran point to render its corresponding model.
All trajectory parsing and φ/ψ calculations happen locally in your browser. The PDB is not uploaded to a server. Plotting uses Plotly.js and molecular rendering uses 3Dmol.js.