Plays a role in innate immunity limiting microbial proliferation in the gut (PubMed:16272120, PubMed:25639794). Acts downstream of a hh-signaling pathway to induce the production of reactive oxygen species (ROS) in response to intestinal bacterial infection (PubMed:25639794). May generate antimicrobial oxidative burst through its peroxidase-like domain (PubMed:16272120). H(+) + NADH + O2 = H2O2 + NAD(+) H(+) + NADPH + O2 = H2O2 + NADP(+) Peroxidase activity is inhibited by aminotriazole and azide. RNAi-mediated knockdown severely reduces adult survival following the ingestion of E.carotovora. In the N-terminal section; belongs to the peroxidase family. Truncated C-terminus.