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