2AB5:
reference: Evolution from DNA to RNA recognition by the bI3 LAGLIDADG maturase., Longo A, Leonard CW, Bassi GS, Berndt D, Krahn JM, Hall TM, Weeks KM, Nat Struct Mol Biol 2005 Sep;12(9):779-787. Epub 2005 Aug 21. PMID: 16116439

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