Nat. Struct. Mol. Biol. 23, 1–2 (2016); published online 6 January 2016; corrected after print 13 January 2016

In the version of this article initially published, the position of the mutation reported in ref. 7 was incorrectly described as L236; it should be L263. In addition, in the HTML version of this article originally published, the concentration of artemisinin was given incorrectly as 50 mM instead of 50 μM; the PDF version and the legend text were correct. The errors have been corrected in the PDF and HTML versions of the article.