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Delineating the effects of guanosine mutations on HIV-2 RNA packaging. X-axis, number of guanosines mutated; y-axis, RNA packaging efficiency. Blue dots, mutants containing site 3 mutations; yellow dots, mutants without site 3 mutation but containing site 2 mutations; red dots, wild-type and a mutant (M56789) without sites 2 or 3 mutations.
