An HIV mutant has been identified that is resistant to the drug AZT.Most likely the mutation occurred in the viral gene that encodes for

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AZT is a nucleoside analog that inhibits the activity of reverse transcriptase, the enzyme responsible for reverse transcription of viral RNA to DNA. Therefore, a mutation in the reverse transcriptase gene would confer resistance to AZT.

An HIV Mutant Has Been Identified That Is Resistant to the Drug