1. MOE Key Laboratory of Bioinformatics, Tsinghua University, Beijing 100084, China
2. Center for Synthetic & Systems Biology, Tsinghua University, Beijing 100084, China
3. School of Life Sciences, Tsinghua University, Beijing 100084, China
4. Joint Graduate Program of Peking-Tsinghua-National Institute of Biological Science, Tsinghua University, Beijing 100084, China