About the Authors

Christian G. Noble

Affiliation Laboratory of Macromolecular Structure, Institute of Molecular and Cell Biology, Singapore, Singapore

Haiwei Song

To whom correspondence should be addressed. E-mail: haiwei@imcb.a-star.edu.sg

Affiliation Laboratory of Macromolecular Structure, Institute of Molecular and Cell Biology, Singapore, Singapore

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HS CN. Performed the experiments: CN. Analyzed the data: HS CN. Contributed reagents/materials/analysis tools: CN. Wrote the paper: HS CN.