Figure 1From: Parallel evolution of histophagy in ciliates of the genus TetrahymenaSecondary structure model of the small subunit ribosomal RNA molecule of Tetrahymena bergeri. The model was constructed with the RNA Viz program [42] and shows 65 variable sites (in red). The additional 4 variable sites are missing in the Tetrahymena bergeri sequence (cf. Additional file 1:Table1.xls).Back to article page