Dye-sensitized photoinactivation of the lactic dehydrogenase and acetylcholinesterase from the boll weevil,Anthonomous grandis |
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| Authors: | Michael F Callaham Coleman O Palmertree Joe R Broome James R Heitz |
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| Institution: | Department of Biochemistry, Mississippi State University, Mississippi Agricultural and Forestry Experiment Station, Mississippi State, Mississippi 39762 USA |
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| Abstract: | The lactic dehydrogenase and acetylcholinesterase enzymes of the boll weevil, Anthonomous grandis, have been shown to be inactivated by dye-sensitized photooxidation mediated by substituted xanthenes. The efficiency of the photooxidation reaction was correlated with the degree of halogenation of the dye molecule, the efficiency of the dye in singlet oxygen formation, and the strength of binding to lactic dehydrogenase. Changes in the in vivo levels of these enzymes due to ingestion of rose bengal by adult weevils are not further modified in the presence of light. |
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