Volume 150, No. 2, February 2018. https://doi.org/10.1085/jgp.201711889

The author regrets that in the original version of this article, Dr. Stephen Baylor’s first name was misspelled. Additionally, for Fig. 9 B, the hours postfertilization given in the legend was incorrect. The figure and its corrected legend appear below.

All versions of this article have been corrected.

This article is available under a Creative Commons License (Attribution 4.0 International, as described at https://creativecommons.org/licenses/by/4.0/).