Larval storage protein (LSP) which may serve as a store of amino acids for synthesis of adult proteins (Probable). 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). Secreted in the hemolymph. Hemolymph. In last instar larval fat body and hemolymph. Belongs to the hemocyanin family.