4NUZ:
reference: Crystal structure of Streptococcus pyogenes EndoS, an immunomodulatory endoglycosidase specific for human IgG antibodies., Trastoy B, Lomino JV, Pierce BG, Carter LG, Gunther S, Giddens JP, Snyder GA, Weiss TM, Weng Z, Wang LX, Sundberg EJ, Proc Natl Acad Sci U S A. 2014 May 6;111(18):6714-9. doi:, 10.1073/pnas.1322908111. Epub 2014 Apr 21. PMID: 24753590

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