1 Department of Biochemistry and Molecular Biology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota, USA
2 Key Laboratory of Bio-Resources and Eco-Environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan, People's Republic of China
3 Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois, USA