The capsid heavy atoms of single bondR3R2R1single bond were superimposed with the single bondKRRsingle bondcoordinate of the Bz-Nle-KRR-H inhibitor bound to DV2 NS2B/NS3pro [13], while the substrate backbone atoms of N5R4 and S1′–I5′ were superimposed with the X-ray structures of the WNV NS2B/NS3pro complexed with the inhibitor aprotinin (2IJO). Note that the aprotinin inhibitor, also known as bovine pancreatic trypsin inhibitor, is a long peptide of 56 amino acids [12].