Center for Genomics and Bioinformatics, Indiana University, Bloomington, Indiana, USA. jcolbour@cgb.indiana.edu|Center for Genomics and Bioinformatics, Indiana University, Bloomington, Indiana, USA. jcolbour@cgb.indiana.edu|Center for Genomics and Bioinformatics, Indiana University, Bloomington, Indiana, USA. jcolbour@cgb.indiana.edu