Figure 1 - full size

 

Figure 1.
Figure 1. Siroheme biosynthesis and its relationship to cobalamin (vitamin B[12]) and protoporphyrin IX-derived macrocycles (heme and chlorophyll).

The above figure is reprinted by permission from Macmillan Publishers Ltd: Nat Struct Biol (2003, 10, 1064-1073) copyright 2003.