An 8.9-kb su(s) genomic DNA fragment, which includes sequences from the -973 nucleotide to the +7962 nucleotide, in which the acidic region (ACR), comprising aa 12-29, is deleted.
su(sable)dACR partially rescues su(sable)R39
Addition of su(s)dACR to the su(s)R39, vk background nearly restores the low brown eye-pigment levels seen in su(s)[+], vk flies.