 Likewise, catalases HPI and HPII, encoded by "katG" and "katE" convert harmful hydrogen peroxide molecules to water and oxygen.The "otsBA" gene product trehalose functions as an osmoprotectant and is needed for desiccation resistance.Additional RpoS-dependent factors involved in oxidative stress include glutathione reductase (encoded by "gor"), and superoxide dismutase (encoded by "sodC").