furthermore , by including positively charged bis-trimethylamino-polyethylene glycol ( peg ) or negatively charged bis-sulfoamino-peg in an aqueous two-phase system of dextran t500 and peg 6000 , the partition of the igg-sensitized bacteria was affected by either of the polymers , whereas that of the parent bacteria was not .
C0032483
peg
C0030775
peg 6000