Expression of {HEAD ~ the effector gene results} in expression of a cell surface antigen that can be used to deplete {TAIL ~ the undifferentiated cells} 
Expression of { HEAD ~ the effector gene results } in expression of a cell surface antigen that can be used to deplete { TAIL ~ the undifferentiated cells }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL