The X:5848082..5935388 release 6 coordinates of the left breakpoint are estimates based solely on polytene cytology. The left extent corresponds to the estimated position of the left end of 5C4, because the published cytology indicates the breakpoint lies to the right of 5C3. The right extent corresponds to the estimated position of the left end of 5C10, which the published cytology indicates is deleted.

The X:6533999..6674387 release 6 coordinates of the right breakpoint are estimates. The left extent corresponds to the left end of dx, which published results say is deleted. The right extent corresponds to the left end of Mcm6, which complementation tests at the Bloomington Stock Center showed is not deleted.

Heterozygous Df(1)dx81 mutant females exhibit a dilated cardiomyopathy phenotype, including an increased end-systolic dimension (EDD) and a decreased fractional shortening (FS) compared to controls. Bristles appear short and thin compared to wild type (Minute phenotype).

Flies heterozygous for the deletion show a Minute bristle phenotype.