A tubulin promoter drives expression of a mutated form of msl-3 (amino acid replacement K116G), tagged at the C-terminal end with Tag:FLAG.
msl-3K116G.tub.Tag:FLAG partially rescues msl-3083
69.3% of msl-3083 males carrying msl-3K116G.tub.T:Zzzz\FLAG survive to adulthood.