English: The model above shows the process of anaerobic respiration through denitrification which takes place in some bacteria. The process shown takes place in the plasma membrane of prokaryotes. NO3 goes through respiratory dehydrogenase and reduces through each step from the Ubiquinose through the bc1 complex through the ATP Synthase protein as well. Each reductase loses oxygen through each step so that the final product of anaerobic respiration is N2.

1. Cytoplasm

2. Periplasm