Biosynthesis of cofactors, prosthetic groups, and carriers:Heme, porphyrin, and cobalamin

Cobalamin biosynthesis protein (NCBI)
cobalamin (5'-phosphate) synthase (NCBI)
Precorrin-4 C11-methyltransferase (NCBI)
Precorrin-6x reductase CbiJ/CobK (NCBI)
Porphobilinogen deaminase (NCBI)
uroporphyrin-III C-methyltransferase (NCBI)
precorrin-2 C-20 methyltransferase (NCBI)
precorrin-3B C17-methyltransferase (NCBI)
Cobyrinic acid a,c-diamide synthase:Cobyrinic acid a,c-diamide synthase CbiA (NCBI)
Conserved hypothetical protein (NCBI)