Low phenol oxidase activity; activator preparations from as efficient as those from wild type.
Dopamine levels 70% of those of wild-type.
Mutant homozygotes have about 10% of the phenol oxidase activity of most wild-type strains. 50 h mutant pupae lack activity for the proenzyme PHOX and have detectable but reduced amounts of the diphenol oxidase components A1, A2 and A3 as compared to Samarkand wild-type pupae.
Phenol oxidase less heat stable than in wild-type (not confirmed by FBrf0045547).
Adults are normal size and have normal fertility and longevity. Body colour: body and bristle colour of adults is slightly yellower than normal.
Body colour: underpigmented; less so than qs1. Hemolymph of adult fails to turn black on exposure to air; that of larva does.
No discernible mutant phenotype in larvae.