Science for Life Laboratory, School of Computer Science and Communication, KTH Royal Institute of Technology, Solna, Sweden. ksahlin@kth.se.|Science for Life Laboratory, School of Computer Science and Communication, KTH Royal Institute of Technology, Solna, Sweden. ksahlin@kth.se.|Science for Life Laboratory, School of Computer Science and Communication, KTH Royal Institute of Technology, Solna, Sweden. ksahlin@kth.se.|Bioinformatics Centre, Institute of Microbial Technology, Sector 39A, Chandigarh, India. raghava@imtech.res.in.