Using {TAIL ~ the methods} of {HEAD ~ the present invention}, nucleoside analogs may be screened for the ability to be incorporated by reverse transcriptase of human immunodeficiency virus and cause incorrect base pairing 
Using { TAIL ~ the methods } of { HEAD ~ the present invention } , nucleoside analogs may be screened for the ability to be incorporated by reverse transcriptase of human immunodeficiency virus and cause incorrect base pairing
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH