"Data shows that SMUG1 forms an extensive network of contacts with DNA involving certain amino acids. Phe98 is involved in the stacking interaction in the base-binding pocket of the active site. His239 handles the DNA backbone via a contact with a phosphate group and Arg243 gets inserted into the void formed after Ura base flipping out from the DNA duplex and forms a network of hydrogen bonds with neighboring nucleobases."xsd:string