Figure 5.

Size distribution, ribozyme and gene content of hairpin-containing contigs. (A) Histogram of all contigs with end repeats (i.e. that are believed to correspond to complete circular ssRNA molecules) that contain a hairpin ribozyme. The sizes of the inferred circular ssRNAs corresponding to each contig is plotted. The total heights of the bars indicate the number of contigs corresponding to a circular molecule in the relevant size range. The heights of each colored bar represent the number of those contigs with the relevant opposite strand property. ‘Other ribozyme’: ribozyme class present on the reverse strand, relative to the hairpin ribozyme. (‘hhead’ = type-III hammerhead ribozyme, ‘twister’ = type-P1 twister ribozyme.) Some contigs contain a hairpin ribozyme in both strand orientations. ‘Large contigs’: depicts the rarer large contigs. (B) Histogram of the same contigs as in part (A). ‘Coding’: indicates whether at least one region exhibited significant evidence of protein-coding, according to RNAcode.