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(A) Hydrogen bond interactions of Ser33. (B) Hydrogen bond interactions of Asp60. (C) Hydrogen bond interactions of Ser62. (D) Hydrogen bond interactions of Thr220. The residues from NK are in standard atomic colours, labelled by residue name, and shown with the line rendering. This picture was created using Weblab Viewlite 5.0. Dashed lines are hydrogen bonds.
