Hypothetical metabolic pathways and reversed electron transport in the anammoxosome . ( a ) Anammox catabolism that uses nitrite as the electron acceptor for the creation of a proton motive force over the anammoxosomal membrane . ( b ) Proton motive force-driven reversed electron transport combines central catabolism with nitrate reductase ( NAR ) to generate ferredoxin for carbon dioxide reduction in the acetyl-CoA pathway.
22.
The engine is powered by proton motive force, i . e ., by the flow of protons ( hydrogen ions ) across the bacterial cell membrane due to a concentration gradient set up by the cell's metabolism . ( In species of the genus " Vibrio ", there are two kinds of flagella, lateral and polar, and some are driven by a sodium Spirillum " bacteria have helical bodies with flagella at either end, and they spin about the central axis of their bodies as they move through the water.
