Electron acceptors for respiration and methanogenesis in prokaryotes

Electron acceptor	Reduced end product	Process	Organism
O2	H2O	aerobic respiration	Escherichia, Streptomyces
NO3	NO2, NH3 or N2	denitrification	Bacillus, Pseudomonas
SO4	S or H2S	sulfate reduction	Desulfovibrio
fumarate	succinate	anaerobic respiration using an e- acceptor	Escherichia
CO2	CH4	methanogenesis	Methanococcus