Mutants show no morphological defects.
Su(dpp)39CDE1 is a dominant maternal effect suppressor of the dpp haploinsufficiency phenotype, but it turns out that homozygotes are perfectly viable and fertile on their own. Homozygous Su(dpp)39CDE1 mothers will enhance 3X and 4X dpp+ copy number; flies bearing 3 or 4 wild-type copies of dpp will die with greater frequency compared to their 2X siblings. Su(dpp)39CDE1/Deficiency also gives the same enhancement result, even though Deficiency/+ neither suppresses haploinsufficiency nor enhances >2X dpp+.
Su(dpp)39CDE[+]/Su(dpp)39CDE1 is a suppressor of phenotype of dppH46
Su(dpp)39CDE homozygous mothers (but not heterozygotes) cause lethality of animals bearing more than two copies of dpp+.