P{lacW}biX35 is inserted 1379bp upstream of the bi transcription start site.
EcollacZbi-X35 is expressed in the wing pouch and wing hinge primordium from several cell diameters anterior to the outer edge or presumptive wing vein L2 to the inner edge of presumptive wing vein L5. bi expression is complementary to that of brk.
In wing disc, expressed in cells of both anterior and posterior compartments in a broad region centered upon the dpp expression domain.
Y.H. Sun