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Active site of Tbb14DM with bound VNI. a, secondary structure and stick representations of the 15 residues (blue) within 4 Å from VNI (yellow) shown in stereo view. Location of the corresponding side chains in the ligand-free structure, if different, can be seen as pink lines. The hydrogen bonds around the VNI amide group fragment are indicated as purple dashes. b, altered location of Tyr-103 in ligand-free (salmon) and VNI-bound (blue) Tbb14DM.
