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