1983 年 8 巻 1 号 p. 31-38
The Interfacial isoelectric point (IEP) of lipids was obtained by using electrocapillary phenomena at oil/water interfaces. The value of IEP was found to be influenced by the presence of inorganic electrolyte or antibiotics in the aqueous phase. These changes were explained by the competition counterion binding or by the change in the interfacial pH. These effects were influenced by the penetration of cholesterol into the adsorbed lipid layer. The interfacial isoelectric point of bovine serum albumin (BSA) was found to be 5.279 ± 0.003 by the same method. The counterion binding also took place in the case of BSA.
