Figure 1From: Crystal structure of putative CbiT from Methanocaldococcus jannaschii: an intermediate enzyme activity in cobalamin (vitamin B12) biosynthesis The aerobic and anaerobic pathways of cobalamin synthesis. CobL in the aerobic pathway is colored red. CbiE and CbiT, which are equivalent to CobL, are colored blue and red with a boxed label, respectively, in the anaerobic pathway. The chemical structures of cobalt-precorrin-6B, 7 and 8, which are the substrates and products of CbiE and CbiT, are shown at the bottom of the figure.Back to article page