In an additional embodiment, a composition is provided for permeabilizing {HEAD ~ a cell}, comprising a polyvalent agent that binds to a highly expressed cell surface antigen present on {TAIL ~ the surface} of a cell 
In an additional embodiment , a composition is provided for permeabilizing { HEAD ~ a cell } , comprising a polyvalent agent that binds to a highly expressed cell surface antigen present on { TAIL ~ the surface } of a cell
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH