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