FYI: http://www.tigr.org/docs/tigr-scripts/tgi/das/dsn and http://rice.tigr.org/tdb/e2k1/osa1/irgsp/DAS.shtml I haven't tested it with IGB yet. -Ann -- Ann Loraine Assistant Professor Departments of Genetics, Biostatistics, and Section on Statistical Genetics University of Alabama at Birmingham http://www.ssg.uab.edu http://www.transvar.org