The binding of different insecticides to hemolymph proteins of the corn earworm, Heliothis zea, was studied by an analytical isoelectric focusing technique. Two proteins capable of binding hydrophobic substrates were discovered and identified as lipophorin and arylphorin. Lipophorin, the major lipoprotein of Heliothis zea, demonstrated rather unspecific binding of xenobiotics of different hydrophobicities. Arylphorin, a putative storage protein, revealed strong affinity for compounds of medium polarity, binding only weakly to insecticides of higher or lower polarity.
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Haunerland et al. (1986) studied this question.
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