UASt regulatory sequences drive expression of an inverted repeat.
Expressing mrvaKK103883 under the control of Scer\GAL4srp.Hemo results in significantly fewer macrophages detected within the germ band of stage 12 embryos, as compared to controls; there are no changes in the number of macrophages on (i.e. migrating along) the ventral nerve cord and no changes in the overall number of macrophages.