ProteoTwirl

Protein Options

PDB structure Choose a .pdb file Atom selection Add missing hydrogens with PDBFixer

Atomic radii Collision gas

Calculation Options

CCS multiplier PA only

Viewing orientations Full CCS uses fewer directions because hard-sphere scattering is substantially heavier.

Fast area

Samples Divisions Recursion

Multiplier approximation

Rays per source BVH leaf size Slope threshold Angular threshold

Use depth slicing Discard minimally exposed surface atoms (automatic threshold)

Calculation timeout Histogram only — skip 3D and cartography plots

Visualization Options

Cartography

Colour map Projection Figure width Figure height Shape colour Shape size

Scale AlphaShape markers

Shape views Alpha Hole fill

Interactive 3D

Colour map Background Minimum size Maximum size Protein colour

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Results

Mean CCS — Å² ± — Å²

CCS Multiplier Detail

Data

#	θ (rad)	φ (rad)	CCS (Å²)	PA (Å²)	Multiplier

Download results

Histogram + Interactive 3D

DistributionAwaiting calculation

CCS distributionsUpload a PDB and calculate to compare CCS and projected area.

Interactive 3DAwaiting calculation

Interactive molecular viewThe three-dimensional property view will appear here.

CartographyAwaiting calculation

Vector cartographyWheel to zoom around the cursor; drag to pan at any zoom level.