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. 2011 Aug;193(16):4199–4213. doi: 10.1128/JB.00449-11

Fig. 7.

Fig. 7.

Oxygen-independent biosynthesis of adenosylcobalamin. B. megaterium is able to synthesize vitamin B12 in the absence of oxygen due to the presence of the signature gene cbiX, which results in insertion of cobalt at an early stage, in contrast to the oxygen-dependent pathway.