19.5kb genomic fragment containing numb.
numb+t19.5 rescues numb796/numb1
numb+t19.5 rescues Df(2L)30A-C/numb796
numb+t19.5 efficiently rescues the lethality associated with numb1/numb796 and numb796/Df(2L)30A-C. Adult mechanosensory organ development is almost completely normal in the rescued flies.