1. Institute for Environmental Genomics; University of Oklahoma; Norman OK 73071 USA
2. Department of Microbiology and Plant Biology; University of Oklahoma; Norman OK 73071 USA
3. Virtual Institute for Microbial Stress and Survival; Berkeley USA
4. Earth Sciences Division; Lawrence Berkeley National Laboratory; Berkeley CA 94720 USA
5. Department of Environmental Science and Engineering; Tsinghua University; Beijing 100084 China