Figure 2
The galactose-binding site of the CBM. (a) and (b) show 2Fobs − Fcalc electron-density maps for the galactose and lactose, respectively, contoured at 0.6 e Å−3 (approximately 2σ). (c) and (d) show stereoviews of the binding site with galactose and lactose bound, respectively. Hydrogen bonds are drawn in green and waters are shown as magenta spheres. |