Fig. 1

Isolation of Fusibacter sp. 3D3. a Transmission electron micrograph of bacterial cells filled with electron dense granules of variable density (Bar = 500 nm). b Arsenic speciation, lactate and acetate measurements of Fusibacter sp. strain 3D3 culture in Newman’s modified medium with 20 mM lactate, 10 mM sulphate, 2 mM arsenate, 0.1% (w/v) yeast extract, and 1 mM cysteine versus time. All error bars represent the standard error of the mean of triplicate cultures