4XOC:
reference: Catch-bond mechanism of the bacterial adhesin FimH., Sauer MM, Jakob RP, Eras J, Baday S, Eris D, Navarra G, Berneche S, Ernst B, Maier T, Glockshuber R, Nat Commun. 2016 Mar 7;7:10738. doi: 10.1038/ncomms10738. PMID: 26948702

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