Figure 4.
Figure 4. Mode of binding of the unidentified metal cation
(see the text and Figure 1) located on the 3-fold axis. The
cation is coordinated by His20 N^ epsilon
of three symmetry-related trimers and water molecules Wat429 and
Wat430. Hydrogen bond lengths are denoted in Å (drawn with
SCHAKAL; [Keller 1988]).
epsilon
of three symmetry-related trimers and water molecules Wat429 and
Wat430. Hydrogen bond lengths are denoted in Å (drawn with
SCHAKAL; [Keller 1988]).