Fig. 6

Phylogenetic tree of box C/D snoRNAs. Phylogenetic tree of C/D snoRNAs of 24 plant species and red alga (C. merolae). The phylogenetic tree was constructed from recent literature and NCBI Taxonomy information. The species are assigned to the leaves. ePoPE was applied to each snoRNA family individually (data not shown). To retrieve an impression about the evolution of all snoRNA families these individual results were summarized, again using ePoPE. The numbers are the results of this summary. Green numbers refer to the predicted number of observed genes (families) at each node. Red numbers refer to the number of lost genes (families) while blue numbers to the number of gained genes (families)