6ER2:
reference: Unravelling the specificity and mechanism of sialic acid recognition by the gut symbiont Ruminococcus gnavus., Owen CD, Tailford LE, Monaco S, Suligoj T, Vaux L, Lallement R, Khedri Z, Yu H, Lecointe K, Walshaw J, Tribolo S, Horrex M, Bell A, Chen X, Taylor GL, Varki A, Angulo J, Juge N, Nat Commun. 2017 Dec 19;8(1):2196. doi: 10.1038/s41467-017-02109-8. PMID: 29259165

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