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Purpose: MOLVIEW creates color space-filling model representations of the non-hydrogen atoms of protein based on atomic coordinate data deposited in the Protein Data Bank. MOLVIEW also provides for a semi-interactive rotational transformation of the image about any of the orthogonal axes. CONVERT is supplied to modify the format of atomic- coordinate files from the Protein Data Bank (F. C. Bernstein et al., J. Mol. Biol., 112, 535 (1977)) and to generate the atomic color scheme for use by MOLVIEW. The algorithm is described by R. W. Rowlett, Computers & Chemistry, 9, 301 (1985).

General Description: MOLVIEW uses a simple modified painter's algorithm to produce color space-filling model images of protein molecules based on atomic-coordinate data available from the Protein Data Bank. One characteristic of the image-construction algorithm is that two of the colors available for display are used to construct the image and cannot appear in the final display. The original program was written for a Tandy 2000, which can display 6-color images (of 8 available colors) in 640 x 400 pixel resolution. This IBM-PC version can display 320 x 200 pixel images in only 2 of the 4 available colors.Execution time also suffers considerably from the Tandy 2000 version. CONVERT is a program provided to convert Protein Data Bank atomic-coordinate files into more compact random-access files for use by the program MOLVIEW. Only ATOM, HETATM and CONECT records of Protein Data Bank atomic-coordinate files are used. A description of the format of both Protein Data Bank atomic-coordinate files and the files created by CONVERT are described by R. S. Rowlett, Computers & Chemistry, 9, 301 (1985).

Minimum Hardware Requirements: IBM-PC, 256 Kb memory, color graphics, dual floppy disk drives or hard disk.

BASICA (IBM-PC) Lines of Code: 840