1Y26:
reference: Structural Basis for Discriminative Regulation of Gene Expression by Adenine- and Guanine-Sensing mRNAs., Serganov A, Yuan YR, Pikovskaya O, Polonskaia A, Malinina L, Phan AT, Hobartner C, Micura R, Breaker RR, Patel DJ, Chem Biol 2004 Dec;11(12):1729-41. PMID: 15610857

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