Figure 2.

Phylogenetic tree of DCD domains in plants and related domain architecture. The tree topology was calculated using the Neighbor-Joining algorithm. Hypothetical proteins putatively involved in cell death with c-terminal DCD domains (I. Genbank accession numbers in red), hypothetical proteins with central DCD domains (II. Genbank accession numbers in blue), further hypothetical proteins with N-terminal DCD-domains, ParB domain preceding a DCD-domain and of unclear architecture (III. Genbank accession numbers in black), Kelch-repeat containing proteins (IV. Genbank accession numbers in yellow). The not clearly grouped sequence of Thalassiosira is colored in green. The accession numbers are followed by species names (at: Arabidopsis thaliana; cp: Citrus X paradisi; cr: Ceratopteris richardii; dc: Daucus carota; gm: Glycine max; mt: Medicago truncatula; os: Oryza sativa; pp: Physcomitrella patens; ps: Pisum sativum; tp: Thalassiosira pseudonana) Numbers in nodes indicate bootstrap values (only essentials are shown). The domain names are according to the Simple Modular Architecture Research Tool [19, 20] http://smart.embl-heidelberg.de * this sequence contains may be an incorrectly sequenced C-terminal part