Not known; does not seem to have protease activity. Localized to the salivary glands in the larva. Expressed throughout development, with expression highest in the pupa. Although strongly related to peptidase C2 proteins, it lack the essential Cys, His and Asn residues of the catalytic triad at positions 84, 242 and 267, respectively. Belongs to the peptidase C2 family.