[Electrokinetic properties of Staphylococcus aureus cells].

St. aureus cells belonging to different strains has been shown to have similar asygmoid character of pH-dependent electrophoretic mobility curves with their peaks lying in the area of pH values within 3.0 and 5.0. In this pH area the basic significance in the resulting charge belongs to the phosphoric acid groups of teichoic acid. The electrophoretic mobility of St. aureus cells is determined by the electrostatic charge distributed in the whole volume of their cell walls.