9.B.21.1.2
Frataxin homologue, Yfh1, of 174 aas.  Promotes the biosynthesis of heme as well as the assembly and repair of iron-sulfur clusters by delivering Fe²⁺ to proteins involved in these pathways. It also plays a role in the protection against iron-catalyzed oxidative stress through its ability to catalyze the oxidation of Fe²⁺ to Fe³⁺. It can store large amounts of the metal in the form of a ferrihydrite mineral by oligomerization and may be involved in the regulation of the mitochondrial electron transport chain (Karlberg et al. 2006).