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Figure 1.
Fig. 1. Schematic representation of the AS structure with
labeling and color-coding of the five domains. N, dark blue; A,
light blue; B, yellow; B', magenta; and C, red. The two
catalytically active residues (Asp^286 and Glu^328) are also
shown. They are located at the end of the barrel  -strand 4
and at the tip of -strand 5,
respectively. The figure was produced with MOLSCRIPT (36) and
Raster3D (37).
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