Figure 4
From: The exon context and distribution of Euascomycetes rRNA spliceosomal introns
Analysis of rRNA intron distribution. A. The positions of introns mapped on the homologous sites in the primary structure of E. coli SSU and LSU rRNA. Group I and group II (underlined) introns are shown above the lines, whereas spliceosomal and archaeal (underlined) introns are shown below the lines. B. Results of the broken-stick analysis of rRNA intron distribution. The results of the simulations are shown as are the observed standard deviations for all introns or group I and spliceosomal introns individually for both SSU and LSU rRNA genes.