In another aspect, 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 {HEAD ~ the surface} of {TAIL ~ the cell} 
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In another aspect , 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 { HEAD ~ the surface } of { TAIL ~ the cell }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL