2HCS:
reference: Crystal structure of the RNA polymerase domain of the West Nile virus non-structural protein 5., Malet H, Egloff MP, Selisko B, Butcher RE, Wright PJ, Roberts M, Gruez A, Sulzenbacher G, Vonrhein C, Bricogne G, Mackenzie JM, Khromykh AA, Davidson AD, Canard B, J Biol Chem. 2007 Apr;282(14):10678-89. Epub 2007 Feb 7. PMID: 17287213

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