4EYZ:
reference: Crystal Structure of an Uncommon Cellulosome-Related Protein Module from Ruminococcus flavefaciens That Resembles Papain-Like Cysteine Peptidases., Levy-Assaraf M, Voronov-Goldman M, Rozman Grinberg I, Weiserman G, Shimon LJ, Jindou S, Borovok I, White BA, Bayer EA, Lamed R, Frolow F, PLoS One. 2013;8(2):e56138. doi: 10.1371/journal.pone.0056138. Epub 2013 Feb 14. PMID: 23457513

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