Nat. Biotechnol. 34, 369–371 (2016); published online 7 April 2016; corrected after print 8 June 2016

In the version of this article initially published, on p.369, “European consumers” were said to account for “over €1.1 ($1.21) million” of the “nearly €1.9 million worldwide gluten-free food market”; in both cases the figure should have been in billions, not millions. In addition, the opening sentence said “This winter,” but should have read “Soon,” and on p.371, paragraph three, “at a General Mills facility earlier this year,” should have read “in 2015.” The errors have been corrected in the HTML and PDF versions of the article.