5N8S:
reference: Molecular Mechanistic Insights into Drosophila DHX36-Mediated G-Quadruplex Unfolding: A Structure-Based Model., Chen WF, Rety S, Guo HL, Dai YX, Wu WQ, Liu NN, Auguin D, Liu QW, Hou XM, Dou SX, Xi XG, Structure. 2018 Mar 6;26(3):403-415.e4. doi: 10.1016/j.str.2018.01.008. Epub 2018, Feb 8. PMID: 29429875

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