Carbon Monoxide. Toxic Gas and Fuel for Anaerobes and Aerobes: Carbon Monoxide Dehydrogenases - The Metal-Driven Biogeochemistry of Gaseous Compounds in the Environment - page 60

Figure 13 Proposed reaction mechanisms of ACS. The paramagnetic mechanism (a) includes the
paramagnetic NiFeC species as intermediate, while the diamagnetic mechanism (b) integrates only
diamagnetic intermediates, with Ni cycling between Ni 0 and Ni 2+ . Although the sequence of
substrate binding is random, both mechanisms are shown as ordered reactions for clarity. See the
text for details.