-d or -d0 same as -d2 below
-d1 solid color ribbon (defaults to blue)
-d2 shade from blue at N-terminus to red at C-terminus
-d3 one surface of ribbon is blue, other surface is grey
-d4 shade front surface from blue to red, back surface is grey
-d5 color separate chains using successive color cards
|from input stream. Note that pattern matching on the color records is _not_ done; colors are simply taken sequentially as new chains are encountered.|
|-d6 Color by nearest CA atom as taken from the COLOUR|
records at the head of the input file
The input to ribbon consists of a single text file containing colour information [optional] and atomic coordinates in PDB data bank format. Only CA and carbonyl O atom records are required; all other input atoms are ignored. Ribbon parameters and colouring specified interactively when the program is run. Keyboard interaction may be bypassed by selecting one of the default colouring schemes using the -d flag. A triangular mesh ribbon is output as Raster3D descriptor records. By default the output file contains a set of header records as required by the render program. The header is constructed to include a TMAT matrix corresponding to the transformation matrix contained in file setup.matrix (if it exists), or to the Eulerian angles contained in file setup.angles (if it exists).
Ribbon produces a continuous smooth trace of the protein backbone. For more complicated representations of protein secondary structure it is better to use a different program, e.g. MOLSCRIPT, rather than ribbon.
The files setup.matrix and setup.angles, if they exist, affect the header records produced by ribbon.
anonymous ftp site:
Ethan A Merritt
University of Washington, Seattle WA 98195
Original ribbon code written by Phil Evans for the CCP4 version of FRODO. Modification to describe solid ribbons as triangular mesh for Phong shading in Raster3D package by Ethan A Merritt.
|Raster3D||RIBBON (1)||8 May 1999|