Department of Computer Science, Utah State University, Logan, UT 84322, USA. Nick.Flann@usu.edu.|Department of Computer Science, Utah State University, Logan, UT 84322, USA. Nick.Flann@usu.edu.|Department of Computer Science, Utah State University, Logan, UT 84322, USA. Nick.Flann@usu.edu.|Department of Computer Science, Utah State University, Logan, UT 84322, USA. Nick.Flann@usu.edu.|Department of Computer Science, Utah State University, Logan, UT 84322, USA. Nick.Flann@usu.edu.|South African National Bioinformatics Institute, SA MRC Bioinformatics Unit, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa. simon@sanbi.ac.za.