Mutation in destruction box D1 (amino acid replacements R82A and L85A).
Expression of vihmD1.Scer\UAS.P\T under the control of Scer\GAL4mat.αTub67C.T:Hsim\VP16 in a wild-type or vih+/vih- background has no phenotypic effect.
vihmD1.UASp/Scer\GAL4VP16.mat.αTub67C fails to rescue vih1