Center for Bioinformatics and Computational Biology, University of Delaware, Newark, DE 19711, USA.|Center for Bioinformatics and Computational Biology, University of Delaware, Newark, DE 19711, USA.|Department of Biochemistry and Molecular Medicine, The George Washington University, Washington, DC 20037, USA.|Protein Information Resource, Georgetown University Medical Center, Washington, DC 20007, USA.|Protein Information Resource, Georgetown University Medical Center, Washington, DC 20007, USA.|Protein Information Resource, Georgetown University Medical Center, Washington, DC 20007, USA.|Center for Bioinformatics and Computational Biology, University of Delaware, Newark, DE 19711, USA.|Center for Bioinformatics and Computational Biology, University of Delaware, Newark, DE 19711, USA.|Center for Bioinformatics and Computational Biology, University of Delaware, Newark, DE 19711, USA Protein Information Resource, Georgetown University Medical Center, Washington, DC 20007, USA.|Center for Bioinformatics and Computational Biology, University of Delaware, Newark, DE 19711, USA Protein Information Resource, Georgetown University Medical Center, Washington, DC 20007, USA.