5MK5:
reference: A Helical Bundle in the N-terminal Domain of the BLM Helicase Mediates Dimer and Potentially Hexamer Formation., Shi J, Chen WF, Zhang B, Fan SH, Ai X, Liu NN, Rety S, Xi XG, J Biol Chem. 2017 Feb 22. pii: jbc.M116.761510. doi: 10.1074/jbc.M116.761510. PMID: 28228481

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