Amrita and collaborators reveal the bzaABCDE genes to make benzimidazole lower ligands anaerobically in their new paper in PNAS.
Amrita B. Hazra, Andrew W. Han, Angad P. Mehta, Kenny C. Mok, Vadim Osadchiy, Tadhg P. Begley, and Michiko E. Taga. Anaerobic biosynthesis of the lower ligand of vitamin B12. PNAS, 2015. doi:10.1073/pnas.1509132112