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Figure 3.
Fig. 3. Stereoview of heme I in all three redox forms.
The reduced form is blue; the oxidized form at pH 7.6 is yellow;
the oxidized form at pH 4.0 is red. Both in the reduced and
oxidized forms at pH 7.6, propionate A displays two alternative
side chain conformations. The figure was drawn with Molscript
(44) and Raster3D (45).
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