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Partitioning and purification studies of human IgG were performed in polyethylene glycol (PEG) and citrate aqueous two-phase systems (ATPSs). Initial studies performed with pure IgG solutions showed that increasing the concentration of a neutral salt, such as NaCl up to 15% (w/w), increased the partition coefficient of IgG from 0.14 to 5.21. This partitioning behaviour was also observed first in the...
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