The most recent revision of DNATools can be downloaded at http://www.crc.dk/phys/Dnatools/Dnatools_Index.htm Regards Søren -- Dr. scient. Søren W. Rasmussen Carlsberg Laboratory, Department of Physiology 10 Gl. Carlsbergvej, DK-2500, Copenhagen, Denmark Phone 45 3327 5230 / 45 3616 2259, Fax 45 3327 4766 E-mail swr at crc.dk, Homepage http://www.crc.dk/phys/