4PEH:
reference: Structural basis of lariat RNA recognition by the intron debranching enzyme Dbr1., Montemayor EJ, Katolik A, Clark NE, Taylor AB, Schuermann JP, Combs DJ, Johnsson R, Holloway SP, Stevens SW, Damha MJ, Hart PJ, Nucleic Acids Res. 2014 Aug 14. pii: gku725. PMID: 25123664

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