1. Center for Environmental Biotechnology, The University of Tennessee 676 Dabney Hall, Knoxville, Tennessee 37966, Department of Microbiology, The University of Tennessee, Knoxville, Tennessee 37966, Department of Chemistry, SUNY College of Environmental Science and Forestry, Syracuse, New York 13210, Department of Ecology and Evolutionary Biology, The University of Tennessee, Knoxville, Tennessee 37966, and UT-ORNL Joint Institute of Biological Sciences