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Figure 2.
(a) View of the CSA electron density near helices H5 and H6.
Residues with side chains within 5 Å of the density are
identified. A sulfate group (sulfur, yellow; oxygen, red) has
been placed in the density and is coordinated by the side chains
of Lys1324, Arg1467 and Lys1504. The 2F[o] – F[c] map (dark
blue) is contoured at 0.9 and
the F[o] – F[c] map (cyan) is contoured at 2.5 .
For clarity, Lys1327 is not shown. (b) Stereo view showing the
CSA density, a sulfate group and the side chains of nearby
residues. The DBL3x model without ligands was used to calculate
phases for these maps.
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