Division of Genetics,Department of Medicine,Brigham and Women's Hospital,Department of Biological Chemistry and Molecular Pharmacology,Harvard Medical School,Boston 02115,USA

Department of Chemistry,Texas A&M University,College Station 77840,USA

清华大学化学系,北京100084

清华大学生命学院,北京100084

Department of Plant and Pathology and Microbiology,Texas A&M University,College Station 77840,USA

Department of Biology,Texas A&M University,College Station 77840,USA