{TAIL ~ The composition} comprises a polyvalent agent that binds to {HEAD ~ a highly expressed cell surface antigen present} on the surface of a cell 
{ TAIL ~ The composition } comprises a polyvalent agent that binds to { HEAD ~ a highly expressed cell surface antigen present } on the surface of a cell
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH