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