Center for Bioinformatics, Department of Microbiology, Immunology and Pathology, Colorado State University, Colorado, USA. Andrey.Ptitsyn@colostate.edu|Center for Bioinformatics, Department of Microbiology, Immunology and Pathology, Colorado State University, Colorado, USA. Andrey.Ptitsyn@colostate.edu|Center for Bioinformatics, Department of Microbiology, Immunology and Pathology, Colorado State University, Colorado, USA. Andrey.Ptitsyn@colostate.edu