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Figure 2.
Stereo view of ARTT loop in CDTa (native and NAD-bound form)
and Ia (NAD-bound form).Green, CDTa-8.5; yellow, CDTa-9.0; cyan,
CDTa-NAD; magenta, Ia-NAD. Residue numbering is according to
CDTa (present structure). The corresponding residues in Ia are
Tyr-375, Glu-378, and Glu-380.
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