About the Authors
Department of Molecular Biology, Umeå University, Umeå, Sweden
Umeå Centre of Molecular Medicine, Umeå University, Umeå, Sweden
The authors have declared that no competing interests exist.
Conceived and designed the experiments: CC ST ASB. Performed the experiments: CC ST. Analyzed the data: CC ST ASB. Contributed reagents/materials/analysis tools: ASB. Wrote the paper: CC ST ASB.