Bifunctional enzyme with both catalase and broad-spectrum peroxidase activity. AH2 + H2O2 = A + 2 H2O 2 H2O2 = 2 H2O + O2 Binds 1 heme b (iron(II)-protoporphyrin IX) group per monomer. Homodimer or homotetramer. Found in sexual structures such as Huelle cells, but not in primordia, hyphae and conidiophores. Induced by transcription factor stuA upon carbon starvation and during early sexual development. Formation of the three residue Trp-Tyr-Met cross-link is important for the catalase, but not the peroxidase activity of the enzyme. Belongs to the peroxidase family. Peroxidase/catalase subfamily.