Mutated His3 gene (amino acid replacement T118I) in the context of a histone gene repeat unit.
His3HisGU.T118I fails to rescue Df(2L)HisC
12 copies of a histone repeat unit containing the His3HisGU.T118I mutation (flies contain 4 copies of PBac{3xHisGU.H3T118I}) fails to rescue the embryonic lethality of Df(2L)HisC homozygotes.
12 copies of a histone repeat unit containing the His3HisGU.T118I mutation (flies contain 4 copies of PBac{3xHisGU.H3T118I}) only very slightly rescue the severe growth defect seen in homozygous Df(2L)HisC clones in the wing disc; the rescued clones are significantly smaller than their twin spots (which are heterozygous for Df(2L)HisC).