About the Authors

Marinos Kallikourdis

Affiliation Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge, United Kingdom

Alexander G. Betz

To whom correspondence should be addressed. E-mail: betz@mrc-lmb.cam.ac.uk

Affiliation Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AB MK. Performed the experiments: MK. Analyzed the data: AB MK. Wrote the paper: AB MK.