Pseudouridine residues in the 5'-terminus of uridine-rich nuclear RNA I (U1 RNA).
D000818:Animals; D001483:Base Sequence; D055598:Chemical Phenomena; D002621:Chemistry; D006367:HeLa Cells; D006801:Humans; D008114:Liver Neoplasms, Experimental; D011560:Pseudouridine / Q000032:analysis*; D012332:RNA, Heterogeneous Nuclear; D014529:Uridine / Q000031:analogs & derivatives*
D012332:RNA, Heterogeneous Nuclear; D011560:Pseudouridine; D014529:Uridine