ABSTRACT
Aqueous two-phase systems have been widely used for separation and purification of proteins, enzymes, and cells [1,2]. The partition of conventional liposomes in the aqueous two-phase system of poly(ethylene oxide) (PEO)/ dextran has been investigated as a model of cell separation [3-6]. The partition is affected by the size [3,4] and lipid composition of the liposome employed [5,6]. The surface property of the liposome was, of course, predominant in affecting the partition [7,8].
