Fig. 4From: Redesign of a novel d-allulose 3-epimerase from Staphylococcus aureus for thermostability and efficient biocatalytic production of d-alluloseResidues at substrate binding site of SaDAE homology structure. a The overall structure of SaDAE. The catalytic residues are shown as cyan sticks. Mn(II) is displayed as a purple sphere. b Residues of SaDAE forms hydrogen bond with substrate. The substrates d-fructose and d-allulose are shown as magenta and cyan sticks, respectively. c The active site and rational designed residues on the surface of SaDAEBack to article page