1 Institut de Biotecnologia i de Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Barcelona, Spain.
2 Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain.
3 Department of Life Science, Chung-Ang University, Seoul, South Korea.
4 Department of Physics, School of Science, Tianjin University, Tianjin, China.
5 Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, China.