1VPC:
reference: NMR structure of the (52-96) C-terminal domain of the HIV-1 regulatory protein Vpr: molecular insights into its biological functions., Schuler W, Wecker K, de Rocquigny H, Baudat Y, Sire J, Roques BP, J Mol Biol 1999 Feb 5;285(5):2105-17. PMID: 9925788

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