Secretion of [http://en.wikipedia/org/wiki/biofilm biofilm]-degrading compounds from [http://en.wikipedia.org/wiki/Caulobacter_crescentus Caulobacter crescentus].
Hydrogen production in [http://en.wikipedia.org/wiki/Rhizobium_etli Rhizobium etli] in [http://en.wikipedia.org/wiki/Phaseolus_vulgaris Phaseolus vulgaris].