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The HIV-1 accessory protein Vif (virion infectivity factor) is required for the production of infectious virions by CD4(+) lymphocytes. Vif facilitates particle infectivity by blocking the inhibitory activity of APOBEC3G (CEM15), a virion-encapsidated cellular protein that deaminates minus-strand reverse transcript cytosines to uracils. We report that HIV-1(More)
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