1G9E:
reference: Solution structure and backbone dynamics of an antigen-free heavy chain variable domain (VHH) from Llama., Renisio JG, Perez J, Czisch M, Guenneugues M, Bornet O, Frenken L, Cambillau C, Darbon H, Proteins 2002 Jun 1;47(4):546-55. PMID: 12001233

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