1. State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Peking-Tsinghua Center for Life Sciences, Beijing 100871, China
2. Department of Genetics, North Carolina State University, Raleigh, North Carolina 27695
3. Center for Plant Cell Biology, Department of Botany and Plant Sciences, University of California, Riverside, California 92507
4. Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China
5. National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
6. Department of Plant Biology, North Carolina State University, Raleigh, North Carolina 27695