1VQF:
reference: Context dependence of mutational effects in a protein: the crystal structures of the V35I, I47V and V35I/I47V gene V protein core mutants., Zhang H, Skinner MM, Sandberg WS, Wang AH, Terwilliger TC, J Mol Biol 1996 May 31;259(1):148-59. PMID: 8648642

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