4AQ1:
reference: SbsB structure and lattice reconstruction unveil Ca2+ triggered S-layer assembly., Baranova E, Fronzes R, Garcia-Pino A, Van Gerven N, Papapostolou D, Pehau-Arnaudet G, Pardon E, Steyaert J, Howorka S, Remaut H, Nature. 2012 Jul 5;487(7405):119-22. PMID: 22722836

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