Computational Biology Unit, Bergen Center for Computational Science, UNIFOB/UiB, Thormoehlensgt,55, N-5008 Bergen, Norway. flikka@ii.uib.no|Computational Biology Unit, Bergen Center for Computational Science, UNIFOB/UiB, Thormoehlensgt,55, N-5008 Bergen, Norway. flikka@ii.uib.no|Computational Biology Unit, Bergen Center for Computational Science, UNIFOB/UiB, Thormoehlensgt,55, N-5008 Bergen, Norway. flikka@ii.uib.no|Computational Biology Unit, Bergen Center for Computational Science, UNIFOB/UiB, Thormoehlensgt,55, N-5008 Bergen, Norway. flikka@ii.uib.no