Metabolizes pyrethroid insecticides and other xenobiotics. Found only in adults and late pupae. By phenobarbital in susceptible strains (3-fold in CS), but not in the LPR strain. Alleles from the pyrethroid-susceptible strains CS (CYP6D1v2) (shown here), aabys (CYP6D1v3), ISK (CYP6D1v4), OCR (CYP6D1v5) and Edinburgh, and one allele from the pyrethroid-resistant strain LPR (CYP6D1v1) are described here. Expressed at higher levels in LPR compared to susceptible flies, it is responsible for monooxygenase-mediated pyrethroid resistance. Belongs to the cytochrome P450 family.