2XFC:
reference: Glycoprotein organization of Chikungunya virus particles revealed by X-ray crystallography., Voss JE, Vaney MC, Duquerroy S, Vonrhein C, Girard-Blanc C, Crublet E, Thompson A, Bricogne G, Rey FA, Nature. 2010 Dec 2;468(7324):709-12. PMID: 21124458

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