Department of Computer Science, School of Computer Science, Florida State University, Tallahassee, FL, USA.|US Department of Energy, Joint Genome Institute, Walnut Creek, CA, USA.|Pacific Biosciences Inc, Menlo Park, CA, USA.|Department of Computer Science, School of Computer Science, Florida State University, Tallahassee, FL, USA.|US Department of Energy, Joint Genome Institute, Walnut Creek, CA, USA.