Drennan, C. L., R. G. Matthews, and M. L. Ludwig. 1994. Cobalamin-dependent
       methionine synthase: the structure of a methylcobalamin-binding fragment and implications for other B12-dependent enzymes. Curr. Opin. Struct. Biol. 4:919929.

Duda, J., Z. Pedziwilk, and K. Zodrow. 1967. Studies on the vitamin B12, content of the
       leguminous plants. Acta Microbiol. Pol. 6:233-238.

English, R. S., S. Jin, and J. M. Shively. 1995. Use of electroporation to generate a
       Thiobacillus neapolitanus carboxysome mutant. Appl. Environ. Microbiol.
       61:3256-3260.

English, R. S., S. C. Lorbach, X. Qin, and J. M. Shively. 1994. Isolation and
       characterization of a carboxysome shell gene from Thiobacillus neapolitanus.
       Mol. Microbiol. 12:647-654.

Escalante, S. J. C., and J. R. Roth. 1987. Regulation of cobalamin biosynthetic operons
       in Salmonella typhimurium. J. Bacteriol. 169:2251-2258.

Eschenmoser, A. 1988. Vitamin B12: experiments concerning the origin of its molecular
       structure. Angew. Chem. Int. Ed. Eng. 27:5-39.

Fantes, K H., and O'Callaghan. 1955. The effect of o-phenylenediamine on the
      biosynthesis of vitamin B12: a new vitamin B12, analogue. Biochem. J. 59:79-82.

Fenton, W. A., A. M. Hack, H. F. Willard, A. Gertler, and L. E. Rosenberg. 1982.
      Purification and Properties of Methylmalonyl Coenzyme-a Mutase from HumanLiver. Arch. Biochem. Biophy. 214:815-823.

Ferry, J. 1992. Methane from acetate. J. Bacteriol. 174:5489-5495. Ferry, J. 1993. Methanogenesis: ecology, physiology, biochemistry, and genetics.
       Chapman and Hall, New York.

Ferry, J. 1995. CO dehydrogenase. Annu. Rev. Microbiol. 49:305-333.

Flavin, M., and S. Ochoa. 1957. Metabolism of Propionic Acid in Animal Tissues .1.
      Enzymatic Conversion of Propionate to Succinate. J. Biol. Chem. 229:965-979.

Ford, J. E., E. S. Holdsworth, and S. K. Kon. 1955. The biosynthesis of B12-like
       compounds. Biochem. J. 59:86-93.

Frey, B., J. McCloskey, W. Kersten, and H. Kersten. 1988. New function of vitamin
      B12: cobamide-dependent reduction of epoxyqueuosine to queuosine in tRNAs of
      Escherichia coli and Salmonella typhimurium. J. Bacteriol. 170:2078-2082.