The user adds columns to this file for custom color-coding. Hot spots in the structure should be obvious. Dark colors indicate problems here. A residue may be picked to display information. Residue error in preliminary Alr1 refinement.
All files have a simple format.
Data from other programs may be reformatted to generate the lists of spheres, cylinders, or triangles for display. Ribbons can output primitives suitable for input into several ray-tracing packages. Many utilities support this file format. The figures were converted to PostScript for printing.