Figure 1 - full size

Figure 1.
FIG. 1. Schematic of reaction catalyzed by odCPO/Hem13p. Propionate side chains on the pyrrole A and B rings are decarboxylated to form vinyl groups and two molecules of carbon dioxide. Molecular oxygen is converted to hydrogen peroxide, presumably via abstraction of a hydrogen atom from each of the propionate/vinyl C- atoms.