FIG. 3.

Phylogenetic analysis of Geobacteraceae 16S rRNA and citrate synthase (gltA) mRNA transcript sequences amplified from the U(VI)-contaminated site at Rifle, Colorado, the Fe(III) reduction zone of a petroleum-contaminated aquifer in Bemidji, Minnesota, a runoff recharge pool from a highway in Plymouth, Massachusetts, that has been exposed to CMA, and a freshwater sediment fuel cell deployed in Nantucket, Massachusetts. (A) 16S rRNA nucleotide sequence comparisons; (B) citrate synthase amino acid sequence comparisons. Phylogenetic trees were constructed with the Jukes-Cantor algorithm. Desulfitobacterium hafniense was used as the outgroup for both trees, and bootstrap values were based on 100 replicates.