6HWX:
reference: Structure and architecture of immature and mature murine leukemia virus capsids., Qu K, Glass B, Dolezal M, Schur FKM, Murciano B, Rein A, Rumlova M, Ruml T, Krausslich HG, Briggs JAG, Proc Natl Acad Sci U S A. 2018 Nov 26. pii: 1811580115. doi:, 10.1073/pnas.1811580115. PMID: 30478053

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