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Figure 1.
Figure 1 Ribbon representation of a single subunit of the
reduced Axcyt c' structure showing the position of the heme.
Also depicted are the side chains of the proximal His, Leu16 and
the two Cys residues that form thioether bridges to the heme.
The Leu blocks access to the vacant sixth coordination site in
the distal pocket. The location of the crystallographic 2-fold
axis is indicated, which is perpendicular to the plane of the
paper. A 180° rotation of this subunit about the 2-fold axis
generates the second subunit of the functional dimer. The
structure is colored with respect to sequence number, starting
with blue at the N-terminus and finishing with red at the
C-terminus. This figure was produced using MOLSCRIPT (Kraulis,
1991) and Raster3D (Merritt and Bacon, 1997).
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