sulfur-based autotrophic bioreduction of Cr(VI) mediated by inorganic carbon species: metagenome

the enrichment of genes associated with electron shuttles and conductive pili expands the paradigm of extracellular electron transfer, while the Wood-Ljungdahl pathway streamlines microbial metabolic proliferation with reduced energy expenditure. Quantitative analysis of these functional genes offers a plausible mechanism underlying the observed shifts in electron competition between IC and Cr(VI).