Correction to: Nature https://doi.org/10.1038/nature16994Published online 17 February 2016

In this Letter, affiliation number 1 was incorrectly listed as ‘Department of Biology, Technion – Israel Institute of Technion, Haifa 32000, Israel’ instead of ‘Department of Biology, Technion- Israel Institute of Technology, Haifa 32000, Israel’. The original Letter has not been corrected.