Laboratory for Structural Bioinformatics, Department of Bioinformatics and Computational Biology, George Mason University, 10900 University Blvd, MS 5B3, Manassas, VA 20110, USA.|Laboratory for Structural Bioinformatics, Department of Bioinformatics and Computational Biology, George Mason University, 10900 University Blvd, MS 5B3, Manassas, VA 20110, USA.