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  • Title: [Isolation and quantitation of chloroquine-binding proteins in Plasmodium berghei].
    Author: Wang Q, Wang M, Chang H, Yang B.
    Journal: Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi; 1999; 17(4):228-30. PubMed ID: 12563771.
    Abstract:
    AIM: To isolate and quantitate chloroquine (CQ)-binding proteins in both CQ-sensitive (CS) AND CQ-resistant (CR) Plasmodium berghei. METHODS: P. berghei infected mice were each given i.g. CQ 400 mg/kg, respectively, 3 h later, the proteins of the parasites collected were separated using Ultrogel AcA34 gel column, followed by CQ extraction, the CQ concentration was determined by HPLC (extra standard). RESULTS: There were 58 protein peaks in the CS, all of which were bound with CQ, fraction Nos. 64-86 (peak 9) being the predominant, accounting for 16.4% of the total amount of CQ-binding protein. In the CR there were 40 protein peaks, among which 32 were bound with CQ, the predominant fraction Nos. 60-83 (peaks 6, 7), had a higher CQ-binding ability than CS. CONCLUSION: The distribution and amount of each CQ-binding protein peak in both CS and CR strains of P. berghei were demonstrated, exhibiting differences in the ability of CQ-binding not only between CS and CR strains but also within the same strain.
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