Drives expression in larval myoblasts; in the parts of the wing disc that will develop into the wing blade, mesothoracic scutum, and scutellum; in the pupal wing blade; in a subset of pupal mesothoracic myoblasts; in some adult muscles including the indirect flight muscle, proboscis muscle, and cibarial dilator muscle; and in parts of the adult olfactory system and CNS, including the maxillary palpus, antennal nerve, antennal lobe glomeruli, subesophageal ganglion, and adult brain.
At embryonic stage 13, reporter expression is observed in 31% of somatic muscle cells and in several cardial cells. Expression drops in late stage 16 and is observed only in some ventral somatic muscles.
Assayed at pupal stage, expression observed in T2 (mesothoracic) myoblasts; assumed to be IFM (indirect flight muscle) myoblasts.
The orientation of the insertion was not reported.