Nature Communications 6, Article number: 8733 (2015); Published 22 October 2015; Updated 16 December 2015

An incorrect version of the Supplementary Data 1, in which data in columns E, F, G, H and K of the sheet ‘Reb1’ were sorted independently from the other columns, was inadvertently published with this Article. This version was not used in any of the analyses presented in the paper. The HTML has now been updated to include the correct version of Supplementary Data 1.