For the analysis of DNA molecules I would also recomend X3DNA
Another possibility is 3DNA: (http://rutchem.rutgers.edu/~xiangjun/3DNA/)
however if you would like to obtain a ideal model quicly try DNA tools http://hydra.icgeb.trieste.it/~kristian/dna/model_it.html Michal -- Michal Jakob ______________________________________________ Wroclaw University of Technology Biochemistry Division ul. Gdanska 7/9 bud. F4 50-344 Wroclaw Poland phone: +48 71 320 62 86 fax: +48 71 320 63 37 e-mail: [EMAIL PROTECTED]