Pseudouridine is an isomer of uridine and the most abundant modified nucleoside in non-coding RNA. It fine-tunes and stabilizes regional structures in rRNA and tRNA, maintaining their functions in mRNA decoding, ribosome assembly, processing, and translation. Pseudouridine-modified tRNA fragments can inhibit aberrant protein synthesis and hold promise for research on myelodysplastic syndrome (MDS)-related leukemia.[1][2][3][4][5].