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Figure 1.
Fig. 1. Stylized ribbon representations of the two HIV-1 RNase H domains found in the crystallographic asymmetric unit. The two dmains
are related by noncrystallographic twofold axis that is normal to the figure in view (a) and horizontal in the plane of the page in view
(b). The two monomers interact at the outermost strand (~3) of the five-stranded ~ sheet to form a single large sheet that spans both
domains. The position of His539 is indicated.
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