Figure 5
(a) OMIT difference 2Fo − Fc electron density of xylotriose in N44H–X3 contoured at the 1.0σ level. (b) Chemical diagram of conventional direct hydrogen-bond interactions between X3 and N44H residues. (c) Water-mediated interactions between X3 and the active-site residues and the unconventional C—H⋯O hydrogen bonds between Glu86 and the −1 xylose subunit in N44H–X3. |