VOLUME 290 (2015) PAGES 1–12
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The Clb2 data in Fig. 1B are not correct. The correct Clb2 data, shown here, were included in the initial version of Fig. 1B in the manuscript that was submitted for review, but a duplicate of the Cdc20–3HA data was mistakenly substituted for the Clb2 data in subsequent versions. This correction does not affect the interpretation of the results or the conclusions of this work.