1. Department of Biochemistry and Biophysics and Science for Life Laboratory; Stockholm University, Box 1031; Solna 171 21 Sweden
2. Center for In Silico Protein Science and Center for Advanced Computation; Korea Institute for Advanced Study; Seoul 130-722 Korea
3. Department of Computer Science; Ben Gurion University of the Negev; Israel
4. Center for In Silico Protein Science and School of Computational Sciences; Korea Institute for Advanced Study; Seoul 130-722 Korea
5. School of Biological Sciences; University of Reading, Whiteknights, Reading; RG6 6AS United Kingdom
6. Department of Physics, Chemistry, and Biology, Bioinformatics Division; Linköping University; Linköping 581 83 Sweden