1. Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education) School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P. R. China
2. Department of Chemical & Biomolecular Engineering University of Tennessee Knoxville 37996 TN USA
3. Department of Forestry, Wildlife, and Fisheries, Center for Renewable Carbon University of Tennessee Institute of Agriculture Knoxville 37996 TN USA
4. Joint Institute for Biological Science, Biosciences Division Oak Ridge National Laboratory Oak Ridge 37830 TN USA