Figure 6

Phylogenetic analysis of the 5S genic (A) and intergenic spacer 1 (IGS1) sequences (B). The arrangement of rRNA genes is depicted by U (unlinked) and L (linked). The phylogenetic positions are based on the nearest neighbor analysis of multiple alignments. Accession numbers of taxa are given in Additional file 4. The "5S" and "Cass." symbols before the taxon name indicate either 5S genic or Cassandra sequences. Numbers above branches indicate bootstrap percentages >70. The Saccharomyces cereviseae 5S gene was used as outgroup in (A). The IGS1 cladogram is an unrooted tree. Scale bars indicate the number of base substitutions per site.