Dimethylsulfide (DMS) is an important climatically-active gas, which in the sea is produced primarily by microbial metabolism of the algal compatible solute dimethylsulfoniopropionate. Laboratory growth of Bacteroidetes with DMS resulted in its oxidation to dimethylsulfoxide, but only in the presence of glucose. It was hypothesized that electrons liberated from sulfur oxidation were used to aug...