3ZRZ:
reference: Structural and functional analysis of the tandem {beta}-zipper interaction of a streptococcal protein with human fibronectin., Norris NC, Bingham RJ, Harris G, Speakman A, Jones RP, Leech A, Turkenburg JP, Potts JR, J Biol Chem. 2011 Aug 12. PMID: 21840989

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