ShadyBox [Boxing and shading utility for X Windows for multiple sequence alignments] This utility uses as input files using the .msf (multiple sequence file) format (output from GCG's 'pileup' and 'lineup' programmes or one of the optional formats of 'CulustalV'). Alternatively a file created by GCG's 'pretty' programme can be used or the export text format from MACAW. The programme allows you to generate a PostScript file in which you can box and shade regions. ShadyBox was developed under SunOS 4.1.3. The ANSI C source code should be reasonably easily adaptable to other platforms using UNIX and having the Motif library available. The compressed tar file 'ShadyBox.tar.Z' contains the source code, a tutorial on programme's use, a demo file for use with the tutorial and a binary for Suns running SunOS 4.1.3 or 5.3. The software was developed by Camson Huynh of the Australian National Genomic Information Service (ANGIS), chuynh@angis.su.oz.au to whom suggestions and bug reports should be sent.