1U0P:
reference: Foldon, the natural trimerization domain of T4 fibritin, dissociates into a monomeric A-state form containing a stable beta-hairpin: atomic details of trimer dissociation and local beta-hairpin stability from residual dipolar couplings., Meier S, Guthe S, Kiefhaber T, Grzesiek S, J Mol Biol 2004 Dec 3;344(4):1051-69. PMID: 15544812

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