Abstract
Polymyxin B was immobilized on the ion exchanger, Amberlite IRC-50. The modified support was used as an adsorbent for lipopolysaccharide ofE. coli from a phosphate buffer at pH = 7.0 and T = 20°C. The insertion of a spacer, 6-amino hexanoic acid, improved the adsorption capacity of the modified carrier significantly. Upon partial acetylation (25%) of primary amino groups of immobilized Polymyxin B, the adsorption capacity of the support was halved. From our results, it is concluded that the complex formation between lipopolysaccharide and immobilized Polymyxin B is based on both lipophilic, as well as electrostatic, interactions. Convenient procedures for the immobilization of the ligands and the characterization of the ion exchanger are described.
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Boons, M.A.F.A., Verhoeven, M.L.P.M., Sluyterman, L.A.A. et al. Mechanism and improvement of complex formation between LPS and polymyxin B that is immobilized on an ion exchanger. Appl Biochem Biotechnol 22, 95–107 (1989). https://doi.org/10.1007/BF02922699
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DOI: https://doi.org/10.1007/BF02922699