About the Authors
Temasek Life Sciences Laboratory, National University of Singapore, Singapore
PhD Programme, European Molecular Biology Laboratory, Heidelberg, Germany
Department of Biological Sciences, National University of Singapore, Singapore
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: VH NB SMC. Performed the experiments: VH NB. Analyzed the data: VH NB SMC. Wrote the paper: VH NB SMC.