1LS1:
reference: Structural basis for mobility in the 1.1 A crystal structure of the NG domain of Thermus aquaticus Ffh., Ramirez UD, Minasov G, Focia PJ, Stroud RM, Walter P, Kuhn P, Freymann DM, J Mol Biol 2002 Jul 19;320(4):783-99. PMID: 12095255

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