About the Authors
Division of Microbial Genetics, National Institute of Genetics, Mishima, Japan
Department of Genetics, School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Mishima, Japan
The authors have declared that no competing interests exist.
Conceived and designed the experiments: ST HA. Performed the experiments: ST. Analyzed the data: ST HA. Contributed reagents/materials/analysis tools: ST. Wrote the paper: ST HA.