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Predicted substrate binding region of the BSK family, mapped onto the YtaA surface. The orange and blue surface show the region generally conserved throughout the family. The blue region is specifically highly conserved in YtaA (Table IV). The key active site residue D239YtaA is shown with a red space-filling shell. The unknown ligand in the YtaA structure (green) and the adenosine are shown in ball-and-stick.
