In {HEAD ~ another aspect}, {TAIL ~ a method} for permeabilizing a cell is provided, comprising contacting a cell with a polyvalent agent that binds to a highly expressed cell surface antigen present on the surface of the cell 
In { HEAD ~ another aspect } , { TAIL ~ a method } for permeabilizing a cell is provided , comprising contacting a cell with a polyvalent agent that binds to a highly expressed cell surface antigen present on the surface of the cell
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