UAS regulatory sequences drive expression of a mutant form of Hsap\VGLL4 in which the conserved D/ED/EHF sequence at the core of the two Tondu domains has been mutated to AAAA.
Expression of Hsap\VGLL4T12.Scer\UAS under the control of Scer\GAL4nub.PU has a slight effect on wing size; wings are 95% of the size of those seen in wild-type.