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The interaction of amphiphilic lipopolysaccharides (LPS, endotoxin) from Gram-negative bacteria with the polycationic decapeptide polymyxin B (PMB) and its non-apeptide PMBN was studied mainly by applying isothermal titration calorimetry (ITC). The LPS investigated comprise various mutant and wild-type forms from Salmonella minnesota, differing in the length of their sugar chain, and some wild-type...
It is reported on the interaction of bacterial lipopolysaccharide (LPS, endo-toxin), having different sugar chain length covalently bound to its hydrophobic moiety lipid A, with the polycationic antibiotics polymyxin B (PMB) and PMB-nonapeptide (PMBN). The binding enthalpies and the lipid:peptide binding stoichiometries were determined by isothermal titration calorimetry (ITC). For LPS with a long...
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