Catalyzes the peroxidative oxidation of azurin and cytochrome c551. Likely to provide protection against toxic peroxides. 2 Fe(II)-[cytochrome c] + 2 H(+) + H2O2 = 2 Fe(III)-[cytochrome c] + 2 H2O Binds 2 heme c groups covalently. Heme 1 is low-potential (-330 mV) with 2 His axial ligands and functions in the peroxidase reaction, while heme 2 is high potential (+320 mV) with His and Met axial ligands and functions to feed electrons from electron-shuttle proteins such as cytochrome c and azurin. Organized into two domains, each containing a covalent c-heme in a structure reminiscent of class 1 cytochromes c. The domains are related by a quasi-twofold axis. The domain interface contains a calcium-binding site with an unusual set of ligands. Binds 2 heme groups per subunit (PubMed:8591033). Sequencing of the whole protein indicates about 20% starts on Val-247 (PubMed:8543038). Mature protein with 2 bound heme groups.