3HIB:
reference: Structural evidence for consecutive Hel308-like modules in the spliceosomal ATPase Brr2., Zhang L, Xu T, Maeder C, Bud LO, Shanks J, Nix J, Guthrie C, Pleiss JA, Zhao R, Nat Struct Mol Biol. 2009 Jul;16(7):731-9. Epub 2009 Jun 14. PMID: 19525970

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