2ZFC:
reference: Design of an engineered N-terminal HIV-1 gp41 trimer with enhanced stability and potency., Dwyer JJ, Wilson KL, Martin K, Seedorff JE, Hasan A, Medinas RJ, Davison DK, Feese MD, Richter HT, Kim H, Matthews TJ, Delmedico MK, Protein Sci. 2008 Apr;17(4):633-43. PMID: 18359857

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