4X6K:
reference: Discovery of intramolecular trans-sialidases in human gut microbiota suggests novel mechanisms of mucosal adaptation., Tailford LE, Owen CD, Walshaw J, Crost EH, Hardy-Goddard J, Le Gall G, de Vos WM, Taylor GL, Juge N, Nat Commun. 2015 Jul 8;6:7624. doi: 10.1038/ncomms8624. PMID: 26154892

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