About the Authors

Hong-Lei Liu

Affiliation Department of Cell Biology, Duke University Medical Center, Durham, North Carolina, United States of America

Mark A. Hallen

Affiliations Department of Biochemistry, Duke University Medical Center, Durham, North Carolina, United States of America, Program in Structural Biology and Biophysics, Duke University Medical Center, Durham, North Carolina, United States of America

Sharyn A. Endow

sharyn.endow@duke.edu

Affiliations Department of Cell Biology, Duke University Medical Center, Durham, North Carolina, United States of America, Program in Structural Biology and Biophysics, Duke University Medical Center, Durham, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Designed and performed the kinetic and motility assays: HLL. Conceived and performed the spindle assembly simulations: MAH. Designed the mutants: SAE. Performed the live imaging: SAE. Wrote the manuscript with input and figures by HLL and MAH: SAE. Performed the experiments: HLL MAH SAE. Analyzed the data: HLL MAH SAE. Contributed reagents/materials/analysis tools: HLL MAH SAE. Wrote the paper: SAE MAH HLL.