Figure 1

Northern blot analysis of differentially expressed patterns of CYP4G2 , CYP4D4v2 , and CYP6A38 between permethrin treated and untreated susceptible CS and resistant ALHF house flies. mRNAs were isolated from the whole bodies of 20 surviving house flies 24 h after permethrin treatment with 2 μ g/fly. Blots were hybridized with the cDNA probes derived from three P450 gene fragments. The ethidium bromide stain of 18S ribosomal RNA in agarose gel is shown at the bottom.