About the Authors
Faculty of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, Taiwan, Republic of China
Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
The authors have declared that no competing interests exist.
HPY designed the research. STC, HCC, DAB, and HPY performed the experiments. STC, HCC, and HPY analyzed the data. DAB and HPY wrote the paper.