Characterization of acetylcholinesterases of acaricide-resistant and susceptible strains of the cattle tick Boophilus microplus (Can.)

作者: James Nolan , H.J. Schnitzerling

DOI: 10.1016/0048-3575(75)90073-5

关键词: TickMicrobiologyTrichostrongylusAcaricideSubstrate (chemistry)NematodeAcetylthiocholineLucilia cuprinaEnzymeBiologyAgronomy and Crop ScienceHealth, Toxicology and MutagenesisGeneral Medicine

摘要: Abstract The critical acetylcholinesterase component, that is responsible for the resistance mechanism of decreased sensitivity to inhibitor in cattle tick Boophilus microplus (Can.), has been isolated from organophosphorus-susceptible Yeerongpilly and resistant Biarra Ridgelands strains. With substrate acetylthiocholine this enzyme component gave a pH activity profile similar all Optimal concentration was 1.73.10 −2 M compared 2.70.10 −4 other Computed Km values were 1.98.10 −5 , 3.65.10 6.43.10 −6 Yeerongpilly, Biarra, strains, respectively, while corresponding V max figures 336, 135, 21 μmoles hydrolyzed per gram larvae hour. These results are discussed relation with parameters derived bovine erythrocytes, sheep blowfly Lucilia cuprina nematode Trichostrongylus colubtiformis .

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