The method of identifying nucleic acids, preferably associated with {HEAD ~ other functional units}, which have {TAIL ~ the facilitative activity} described herein is termed Chemi SELEX 
have
The method of identifying nucleic acids , preferably associated with { HEAD ~ other functional units } , which have { TAIL ~ the facilitative activity } described herein is termed Chemi SELEX
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH