Figure 4

Phylogenetic analysis of the CSL protein family. An unrooted neighbor-joining phylogenetic tree of the region corresponding to RHR-N and BTD domains (see Methods). For protein descriptions see Table 1 and Additional file 3. For class F2 only the unambiguous core, not including the S. pombe SPCC1223.13 and S. japonicus SjCSL2, is indicated by shading. Symbols at nodes indicate percentual bootstrap values, no symbol means less than 50% node stability. The scale bar indicates the number of amino acid substitutions per site.