DNA Strider is currently in Version 1.2 and is available for US$200 from its creator: Christian Marck, Service de Biochimie et de Genetique Moleculaire, Bat 142, Centre d'Etudes de Saclay, 91191 GIF-SUR-YVETTE, CEDEX, FRANCE. Version 1.0.1 was freeware and contains about 80% of the functionality of the latest version. Cheers, 10/4, CNC