About the Authors
Department of Biochemistry, University of Wisconsin–Madison, Madison, Wisconsin, United States of America
Department of Molecular Pharmacology and Biological Chemistry, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JKH XL ZD TH LL EAC. Performed the experiments: JKH XL ZD TH. Analyzed the data: JKH XL ZD TH LL EAC. Wrote the paper: JKH XL LL EAC.