Archaeal Proteins/metabolism; Bacterial Proteins/metabolism; Cobamides/biosynthesis; Archaea/metabolism; Archaeal Proteins/chemistry; Archaeal Proteins/genetics; Bacterial Proteins/chemistry; Bacterial Proteins/genetics; Cyanobacteria/metabolism; Hydrogen-Ion Concentration; Methanococcus/enzymology; Methanococcus/genetics; Multienzyme Complexes/chemistry; Multienzyme Complexes/genetics; Multienzyme Complexes/metabolism; Nucleotidyltransferases/chemistry; Nucleotidyltransferases/genetics; Nucleotidyltransferases/metabolism; Osmolar Concentration; Pentosyltransferases/chemistry; Pentosyltransferases/genetics; Pentosyltransferases/metabolism; Phosphates/chemistry; Phosphates/metabolism; Phylogeny; Potassium Compounds/chemistry; Potassium Compounds/metabolism; Salmonella enterica/genetics; Salmonella enterica/metabolism; Substrate Specificity