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. 1999 Mar;73(3):1818–1827. doi: 10.1128/jvi.73.3.1818-1827.1999

FIG. 6.

FIG. 6

Additional mutations in U5 restore the secondary structures of RNA alone in viruses derived from HXB2(Met-AC(Δ142-173)). Dots shows deleted nucleotides 142 to 173 in the context of secondary structure of HXB2(Met-AC). The secondary structure with input deletion mutations and with the additional mutation of a 19-nucleotide insertion was predicted by the MFold RNA folding algorithm (32, 33). Inserted nucleotides are in boldface lowercase letters with line drawing. Boxed nucleotide 182 indicates a point mutation.