Figure 18.

Cellohexaose, in gray and red, bound to L. similis LPMO9A (PDB ID 1ACI) in yellow.¹⁸⁰ Copper atom is shown as an orange sphere, while a hydrogen-bond bridging water molecule (red) and a chloride ion (green) are shown with their vdW radius as “dots”. Hydrogen bonds are shown as yellow dotted lines. Copper atom and C4 atom of the glucosyl unit in +1 subsite is connected with a black dotted line in the space corresponding to the presumed O₂-binding site.