The present invention provides methods of screening for {HEAD ~ a nucleoside analog} that is incorporated and extended at {TAIL ~ high efficiency} by HIV RT and causes incorrect base pairing 
is incorporated at
The present invention provides methods of screening for { HEAD ~ a nucleoside analog } that is incorporated and extended at { TAIL ~ high efficiency } by HIV RT and causes incorrect base pairing
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH