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. 2018 Aug 14;115(35):8769–8774. doi: 10.1073/pnas.1801774115

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Fig. 4. — The galactoside-binding site in the LacY_WW/NPG/Nb9047 complex. (A) The molecule of NPG (yellow sticks) and surrounding side chains of LacY_WW (yellow sticks), nitrogen atoms (blue), oxygen (red), sulfur (light yellow), and hydrogen (white). Dashed lines depict hydrogen bonds. (B) Crossed-eye stereoview of the structural alignment of substrate-binding sites of NPG-bound (LacY_WW/NPG/Nb9047) and apo-LacY_WW (LacY_WW/Nb9039). Carbon atoms of the side chains in LacY_WW/NPG/Nb9047 (yellow) and LacY_WW/Nb9039 (PDB ID code 5GXB) (orange).