Fig. 6

Characterization of snRNA fragments (snRFs). a Proportion of species with a retained 5’ or 3’ end of the parental RNA or those cut from both ends. b Number of species generated by cleavage within a single-stranded or double-stranded region of the parental RNA. c Distribution of cleavage regions within particular structural elements of mature full-length snRNA cut from one end. d Distribution of cleavage regions within particular structural elements of mature full-length snRNA cut from both ends. 5’ SS – 5’ single-stranded region, SL – stem-loop (I through IV), SLIIb/SLIII – single-stranded region between stem-loop II and stem-loop III, SLIII/SLIV – single-stranded region between stem-loop III and stem-loop IV. See Additional file 1: Figure S6 for a schematic representation of the mature snRNA structure