1. Department of Chemical and Biological Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
2. Department of Bacteriology, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
3. Valent BioSciences, Libertyville, Illinois 60048, United States
4. Brazilian Agricultural Research Corporation (Embrapa), Tropical Semi-Arid Research Center (Embrapa Semiárido), Petrolina, Pernambuco 56302-970, Brazil
5. Microbiology Doctoral Training Program, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States