Pseudouridine synthase TruD from Escherichia coli specifically acts on uridine13 in tRNA.
^Ericsson UB, Nordlund P, Hallberg BM (May 2004). "X-ray structure of tRNA pseudouridine synthase TruD reveals an inserted domain with a novel fold". FEBS Letters. 565 (1–3): 59–64. doi:10.1016/j.febslet.2004.03.085. PMID15135053. S2CID31602560.
^Chan CM, Huang RH (September 2009). "Enzymatic characterization and mutational studies of TruD--the fifth family of pseudouridine synthases". Archives of Biochemistry and Biophysics. 489 (1–2): 15–9. doi:10.1016/j.abb.2009.07.023. PMID19664587.