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Fig. 6 | BMC Evolutionary Biology

Fig. 6

From: Delimitation of five astome ciliate species isolated from the digestive tube of three ecologically different groups of lumbricid earthworms, using the internal transcribed spacer region and the hypervariable D1/D2 region of the 28S rRNA gene

Fig. 6

Consensus secondary structure of the astome ITS2 molecule, showing a central loop with three helices corresponding to helices II, III, and IV of other ciliates. Note that helix II has a pyrimidine-pyrimidine mismatch (arrowheads) and helix III bears five bugles (B1–5). Structure logo of the three conserved helices is shown in the right panel. The height of a base is proportional to its frequency in the multiple sequence alignment

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