1M4X:
reference: The structure and evolution of the major capsid protein of a large, lipid-containing DNA virus., Nandhagopal N, Simpson AA, Gurnon JR, Yan X, Baker TS, Graves MV, Van Etten JL, Rossmann MG, Proc Natl Acad Sci U S A 2002 Nov 12;99(23):14758-63. Epub 2002 Oct 31. PMID: 12411581

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