Abstract
The proteins and esterase isozymes from Anopheles stephensi were analysed by polyacrylamide gel electrophoresis. Changes in proteins and esterase isozyme patterns during developmental stages were studied. A few specific protein bands were present especially in the third instar larval stage. In most strains, eggs showed only one esterase band. During the larval development many bands were gradually formed and most anodal bands were lost upon pupation. The adults showed differences in intensity and mobility exhibiting sexual dimorphism. The protein and esterase isozyme patterns of organophosphate (fenthion, methyl parathion and malathion) resistant and susceptible strains during developmental stages were compared. The zymogram and relative mobility showed variation in the number of intensity of proteins and esterase bands in the resistant strains as compared to the susceptible strains.
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