About the Authors
Department of Systems Biology, Center for Biological Sequence Analysis (CBS), Technical University of Denmark, Lyngby, Denmark
The authors have declared that no competing interests exist.
Conceived and designed the experiments: BP CL TNP. Performed the experiments: BP CL TNP. Analyzed the data: BP CL TNP. Contributed reagents/materials/analysis tools: BP CL TNP. Wrote the paper: BP CL TNP.