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...e first [[macrocycle|macrocyclic]] intermediate common to [[heme|haem]], [[siroheme|sirohaem]], [[Cofactor F430|cofactor F₄₃₀]], [[cobalamin]] and c ...

...III]] and adenosylcobyric acid to the final forms in which it is used by [[enzymes]] in both the producing organisms and other species, including humans who a ...and [[fungus|fungi]] do not use it. In [[bacteria]] and [[archaea]], these enzymes include [[methionine synthase]], [[ribonucleotide reductase]], glutamate an ...