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Figure 3.
FIG. 3. Electron density maps around the FMDV 3D active
site. A, stereoview of the final  [A]-weighted 2F[o] -
F[c] Fourier map, contoured at 1.5 , in the isolated 3D
structure with the model placed inside (ball and sticks colored
in atom type code). B, [A]-weighted 2F[o] -
F[c] map, shown at 1.0 , in the FMDV 3D-RNA
complex structure. A portion of the RNA oligonucleotide is shown
in the picture in a stick representation in light green, the
template strand, and dark green, the primer strand. Only two
nucleotides of the template and three of the primer are shown
for clarity. The Mg2+ ion, located close to acidic residues
Asp238, Asp240, and Asp339, is shown as an orange ball. Water
molecules are shown as red balls and labeled as w.
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