Microperoxidase-11 is an undecapeptide derived from horse heart cytochrome c.
The heme-Fe atom of ferrous microperoxidase-11 is unshielded by the protein.
The heme-Fe atom of ferrous microperoxidase-11 is penta-coordinated and is highly reactive.
Ferrous microperoxidase-11 catalyzes the conversion of NO2− to NO.
NO2− induces the nitrosylation of ferrous microperoxidase-11.