3EBN:
reference: C-terminal domain of SARS-CoV main protease can form a 3D domain-swapped dimer., Zhong N, Zhang S, Xue F, Kang X, Zou P, Chen J, Liang C, Rao Z, Jin C, Lou Z, Xia B, Protein Sci. 2009 Apr;18(4):839-44. PMID: 19319935

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