81;89E1-89E2
81;89E
bk2 hits Ubx
Does not completely block transvection, shows some reduction of alula when heterozygous with Cbx alleles of Ubx. Causes weak reduction of pigmentation in posterior segments when heterozygous with Df(3R)Ubx-RS4-8. Causes relatively mild pairing disruption of BX-C when heterozygous with wild type.
Selected on basis of ability to suppress transvection in UbxCbx heterozygotes.
89E break causes a strong bxd allele.
Limits of break 1 from polytene analysis (FBrf0080101) Limits of break 2 from complementation mapping against Ubx (FBrf0080101)