Phenol Oxidases of a Lozenge Mutant of Drosophila

Abstract
Monophenol oxidase (or tyrosinase-A 1 ) activity appears to be absent from extracts from pupae of homozygous lozenge-glossy ( lz g / lz g ) females and ( lz g /♂) males of Drosophila melanogaster . Diphenol oxidase (tyrosinase-A 2 ) activity is less in the mutant extracts than in extracts of wild-type Oregon-R pupae of the same age and sex.