BluB cannibalizes flavin to form the lower ligand of vitamin B12.
Taga, M.E., Larsen, N.A., Howard-Jones, A.R., Walsh, C.T., Walker, G.C.(2007) Nature 446: 449-453
- PubMed: 17377583 
- DOI: 10.1038/nature05611
- Primary Citation of Related Structures:  
2ISJ, 2ISK, 2ISL - PubMed Abstract: 
Vitamin B12 (cobalamin) is among the largest known non-polymeric natural products, and the only vitamin synthesized exclusively by microorganisms. The biosynthesis of the lower ligand of vitamin B(12), 5,6-dimethylbenzimidazole (DMB), is poorly understood ...