Figure 12

ITS2 rRNA transcript secondary structure model of Paralia guyana (strain SV7). Sequence orientation (5′ to 3′) and helix numbering (I, II, III and IV) are specified. An arrowhead shows the pyrimidine-pyrimidine mismatch (C:U and C:C) of Helix II, the known variant of ultra-conserved AGGA motif on the 5′ side of Helix III is indicated by an ellipse and areas of relative conservation between P. marina and P. guyana are boxed. CBCs between P. guyana and P. marina are shaded gray across the entire base pair. HCBCs between P. guyana and P. marina are shaded only on the changed base of the base pair.