Fig. 4 Modeling results in the SAM binding pocket of SARS-CoV nsp14 (PDB ID: 5C8T, resolution 3.2 Å). (A) Contribution of the nitrobenzenesulfonamide core of 13. (B) Contribution of the 2′O linked adenosine of all dinucleosides, including 13. Hydrogen bonds (yellow), halogen bond (green) and π-π stacking interaction (cyan) are represented. (Atoms not involved in protein-ligand interaction are not represented for clarity purpose). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)