uspQ288A usp2 animals progress normally through to apolysis of the the epidermis away from the cuticle (albeit with a briefly longer 3rd instar feeding stage compared to normal larvae). Subsequently, uspQ288A usp2 animals do not form a normal puparium - it is dorso-ventrally flattened, the partially everted anterior spiracles point directly forward, the cuticle is only faintly sclerotized, the 'puparial' cuticle is transparent rather than brown, and head eversion is incomplete. Most animals stop development during the early pupal stage and eventually die.
uspQ288A rescues usp2 first instar larval lethality to the prepupal stage: larvae progress normally through to apolysis of the the epidermis away from the cuticle (albeit with a briefly longer 3rd instar feeding stage compared to normal larvae). Subsequently, uspQ288A usp2 animals do not form a normal puparium and most animals stop development during the early pupal stage and eventually die.