Recombination between PBac{WH}httf05417 and P{XP}d01701 results in deletion of CG9990 and most of htt.
suppressor of variegation, with T(2;3)SbV
The positional effect variegation (PEV) at the Sb locus caused by T(2;3)SbV is significantly suppressed by single copy of httΔ.