5Z4M:
reference: Structural insights into a unique preference for 3' terminal guanine of mirtron in Drosophila TUTase tailor., Cheng L, Li F, Jiang Y, Yu H, Xie C, Shi Y, Gong Q, Nucleic Acids Res. 2018 Nov 8. pii: 5165274. doi: 10.1093/nar/gky1116. PMID: 30407553

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