2IS3:
reference: Crystal Structure of RNase T, an Exoribonuclease Involved in tRNA Maturation and End Turnover., Zuo Y, Zheng H, Wang Y, Chruszcz M, Cymborowski M, Skarina T, Savchenko A, Malhotra A, Minor W, Structure. 2007 Apr;15(4):417-28. PMID: 17437714

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