P{GawB} insertion within intron 6 of hth, 2323bp from the 5' end of hth exon 7. The P{GawB} element is inserted such that the direction of transcription of the Scer\GAL4 and w genes in the element is opposite to the direction of transcription of hth.
The P{GawB}hthP5-GAL4 chromosome is homozygous lethal, but since it complements hthMeis1-P2 and hthP1-K1-8, the lethality of the chromosome may be caused by a second site mutation.