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