Mutated His3 gene (amino acid replacement K122R, to prevent acetylation) in the context of a histone gene repeat unit.
His3HisGU.K122R rescues Df(2L)HisC
12 copies of a histone repeat unit containing the His3HisGU.K122R mutation (flies contain 4 copies of PBac{3xHisGU.H3K122R}) largely rescues the embryonic lethality of Df(2L)HisC homozygotes to adulthood (some pupal lethality is seen).
12 copies of a histone repeat unit containing the His3HisGU.K122R mutation (flies contain 4 copies of PBac{3xHisGU.H3K122R}) rescue the severe growth defect seen in homozygous Df(2L)HisC clones in the wing disc.