About the Authors

Jonathan J Ward

To whom correspondence should be addressed. E-mail: jward@embl.de

Affiliations European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, United Kingdom , European Molecular Biology Laboratory (EMBL), Heidelberg, Germany

Janet M Thornton

Affiliation European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JJW and JMT conceived and designed the experiments and wrote the paper. JJW performed the experiments, analyzed the data, and contributed reagents/materials/analysis tools.