we studied the binding of potassium , calcium , magnesium , spermine , and gentamicin ions to the phosphoinositides by measuring the effect of these cations on the electrophoretic mobility of multilamellar vesicles formed from mixtures of phosphatidylcholine ( pc ) and either phosphatidylinositol , phosphatidylinositol 4-phosphate , or pip2 ;
C0022023
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C0007447
cations