The co-expression of Ras85DV12.cUa.Scer\UAS, but not Nint.U.Scer\UAS, with HPV18\E6V158A.Scer\UAS.T:Hsap\MYC and Hsap\UBE3AScer\UAS.cRa under the control of Scer\GAL4GMR.PU leads to the migration of a considerable proportion of the expressing eye cells into distant pupal tissues (e.g. abdomen), as compared to controls.