The Microbiology subproject is the source of environmental and microbiological expertise that determines the stress response pathways that will be studied, helps the computation group verify the stress response pathway models, develops engineered strains of Desulfovibrio vulgaris, establishes the phenotype and culture conditions most appropriate for the engineered strains, verifies stress response as it relates to metal and radionuclide reduction, and produces the large quantities of biomass needed for protein complex characterization and imaging by the other groups.