Figure 3

The schematic representations of the structure of XAIP-II. The α-helices (purple) and β-strands (orange) are labelled from 1 to 8. Two disulfide bonds are indicated in yellow. The loop α3-β4 (102-118) and α4-β5 (146-149) form the surface which is involved in the binding with xylanase GH11 and are shown in blue. Some important residues are shown in ball and stick model. The loop β6-α6 (180-193), α-helix α6 (1932-06), loop β7-α7 (2182-30) and α-helix α7 (230-243) from the opposite surface of the protein which are assumed to be involved in the binding with α-amylase are indicated in magenta. The residues are shown in ball and stick representation. The figure was drawn using PyMol [26].