2OHC:
reference: Structural and mutational analysis of tRNA intron-splicing endonuclease from Thermoplasma acidophilum DSM 1728: catalytic mechanism of tRNA intron-splicing endonucleases., Kim YK, Mizutani K, Rhee KH, Nam KH, Lee WH, Lee EH, Kim EE, Park SY, Hwang KY, J Bacteriol. 2007 Nov;189(22):8339-46. Epub 2007 Sep 7. PMID: 17827289

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