3DF6:
reference: The thermo- and acido-stable ORF-99 from the archaeal virus AFV1., Goulet A, Spinelli S, Blangy S, van Tilbeurgh H, Leulliot N, Basta T, Prangishvili D, Cambillau C, Campanacci V, Protein Sci. 2009 Jun;18(6):1316-20. PMID: 19472363

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