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