Nat. Neurosci. 17, 1055–1063 (2014); published online 22 June 2014; corrected after print 5 September 2014

In the version of this article initially published, item (ii) in the third paragraph of the Discussion read, “The ability to obtain high-resistance gigaohm seals during patch clamping in the nucleus-attached mode, when dozens of NPCs may be encompassed by the patch pipette, suggests that NPCs can exist in a closed state that restricts ion flow39.” This sentence has been amended to cite its source, which the authors inadvertently eliminated while reducing the reference count for publication. That work has been added to the reference list as ref. 72: Matzke, A.J., Weiger, T.M. & Matzke, M. Ion channels at the nucleus: electrophysiology meets the genome. Mol. Plant 3, 642–652 (2010). In addition, the text has been reworded to avoid directly quoting from the source without attribution; the revised text reads, “Patch clamping in the nucleus-attached mode puts many NPCs in the tip of a patch pipette. The high-resistance seal between the pipette and NE suggests that NPCs can shift to a closed state that restricts ion flux39,72.” The error has been corrected in the HTML and PDF versions of the article.