Fig. 8
The current understanding of the action of the Cysu heme peroxidase in wing morphogenesis. The peroxidase domain of Cysu utilizes Duox, which generates H2O2 to oxidize catecholic compounds and tyrosines that are present in the protein chains of the cuticle [1, 2, 11]. The oxidation of catecholic compounds and tyrosines helps in cross-linking the protein chains, a process that hardens the wing structure