 "Cupriavidus necator" is a hydrogen-oxidizing bacterium (“knallgas” bacterium) capable of growing at the interface of anaerobic and aerobic environments.It can easily adapt between heterotrophic and autotrophic lifestyles.Both organic compounds and hydrogen can be used as a source of energy "C. necator" can perform aerobic or anaerobic respiration by denitrification of nitrate and/or nitrite to nitrogen gas.