A stop codon has been introduced just N-terminal to the D motif (DRWAQA) normally found at the C-terminus of mα.
Expression of mαD.Scer\UAS under the control of Scer\GAL4sca-537.4 results in the production of extra bristles (average 6.5 extra bristles per fly, total of 26 bristle positions on the notum and head assayed).