Updates are available Erratum dated 2014-06-12

Article History

First Online: 23 May 2014

Change Date: 12 June 2014

Change Type: Correction

Change Details: In the legend of figure 2 of the above article (page 388), the sentence “The spacing between polypeptide chains along the fibril axis is constant to a good approximation even for very different polypeptide sequences, a generic property arising from the common inter-side chain hydrogen bonding constraints (orange line in part b).” incorrectly referred to 'inter-side chain' hydrogen bonding constraints, whereas it should have referred to 'inter-main chain' hydrogen bonding constraints. This has been corrected online. The authors apologize for any confusion caused to readers.

Competing interests

: The authors declare no competing financial interests.