1. Graduate Program of Microbial Biology, Department of Cell Biology, Institute of Biology, University of Brasilia, Brasilia 70770-901, Brazil
2. Laboratory of Biochemical Processes, EMBRAPA Agroenergia, Brasilia 70770-901, Brazil
3. Laboratory of Genetics and Biotechnology, EMBRAPA Agroenergia, Brasilia 70770-901, Brazil