Copper-containing oxidase that functions in the formation of pigments such as melanins and other polyphenolic compounds (By similarity). Catalyzes the rate-limiting conversions of tyrosine to DOPA, DOPA to DOPA-quinone and possibly 5,6 dihydroxyindole to indole-5'6 quinone (By similarity). Binds to the surface of hemocytes and is involved in hemocyte melanization (By similarity). Binds the A.niger cell wall component alpha-1,3-glucan, a fungal pathogen-associated molecular pattern (PAMP) that activates the host immune response (PubMed:34443685). L-tyrosine + O2 = H2O + L-dopaquinone 2 L-dopa + O2 = 2 H2O + 2 L-dopaquinone Binds 2 copper ions per subunit. Heterodimer. Secreted in the hemolymph. Expressed in last instar larvae. Belongs to the tyrosinase family.