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Figure 1.
Figure 1. Structure of the PDE4D D201N catalytic domain. (a)
Ribbons diagram. The large red ball represents a zinc ion. The
green sticks are the residues at the active site of the PDE4D2
D201N mutant. (b) Superposition of the active site residues of
the wild-type PDE4D2 (blue sticks) over those of the D201N
mutant. The zinc ion has the same position in the wild-type and
D201N structures. The magnesium ion is from the wild-type
PDE4D2.
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