5YN2:
reference: Elucidation of the mechanism of interaction between Klebsiella pneumoniae pullulanase and cyclodextrin., Saka N, Iwamoto H, Malle D, Takahashi N, Mizutani K, Mikami B, Acta Crystallogr D Struct Biol. 2018 Nov 1;74(Pt 11):1115-1123. doi:, 10.1107/S2059798318014523. Epub 2018 Oct 30. PMID: 30387770

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