About the Authors

Axel T Brunger

To whom correspondence should be addressed. E-mail: brunger@stanford.edu (ATB), mmontal@ucsd.edu (MM)

Mark A Breidenbach
Rongsheng Jin
Audrey Fischer
Jose S Santos
Mauricio Montal

To whom correspondence should be addressed. E-mail: brunger@stanford.edu (ATB), mmontal@ucsd.edu (MM)

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

ATB and MM conceived the hypotheses. ATB, MAB, RJ, AF, JSS, and MM wrote the paper.