UASt regulatory sequences drive expression of Amil\emx with an added hexapeptide motif (the amino acid sequence YPCA which occurs 28-31 residues N-terminal of the homeodomain has been mutated to YPWL).
Expression of Zzzz\emx+hp.Scer\UAS under the control of Scer\GAL4sca-537.4 does not result in a significant rescue of the embryonic brain defects of ems2 mutants.