4C0Z:
reference: Structural model for the covalent adhesion of the Streptococcus pyogenes pilus through a thioester bond., Linke-Winnebeck C, Paterson NG, Young PG, Middleditch MJ, Greenwood DR, Witte G, Baker EN, J Biol Chem. 2013 Nov 12. PMID: 24220033

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