Has manganese peroxidase activity. 2 H(+) + H2O2 + 2 Mn(2+) = 2 H2O + 2 Mn(3+) Binds 1 heme b (iron(II)-protoporphyrin IX) group per subunit. Binds 2 calcium ions per subunit. By incubation with textile industry wastewater. Belongs to the peroxidase family. The order of the peptides shown is unknown.