Construct: 5.7kb deletion of sequences upstream of -1.6kb.
The pbΔSal minigene partially rescues the pb5 homeotic null phenotype. Pseudotracheal rows are present in the labial palps and maxillary palps are normal in size and morphology. Small patches of aristal tissue are often seen on the lateral aspect of the labial palps. A minority of adult animals display a more severe labial palp-to-arista transformation. Some transformants with this allele show a partial labial palp-to-leg phentoype.
Minigene contains the 0.58kb, 0.5kb and the r1r2 pairing sensitive (PS) fragment of pb. Eye colour of transformants is pale orange.