May have a role in detoxification and digestion during embryogenesis and larval development. Ubiquitously expressed before embryonic stage 11. At stage 11, expression is concentrated in the foregut and posterior midgut. By stage 15, in gastric caeca, pharynx, posterior spiracles and anterior edge of midgut. At the end of embryogenesis, expression is confined to gastric caeca. During third instar larvae, expressed at low levels in gastric caeca, midgut and hindgut and high level in fat body. Probably expressed both maternally and zygotically. Belongs to the AB hydrolase superfamily.