In {TAIL ~ 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 the surface of the cell 
In { TAIL ~ 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 the surface of the cell
OTH TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH