Comparison of 2-Cys peroxiredoxin amino acid sequences. A: Amino acid sequence alignment of 2-Cys peroxiredoxins (2CP) from Arabidopsis thaliana (At), Selaginella moellendorffii (Sm), Physcomitrella patens (Pp) and Chlamydomonas reinhardtii (Cr). The peroxidatic and resolving cysteine residues are labeled with "*", "T" indicates the amino acid residues involved in decamer formation and "C" the residues forming the catalytic site. B: Phylogramme of the 2CP sequences shown in Fig. 5A (red) and additional 2CP from chlorobionts and cyanobacteria as listed in PeroxiBase . The tree was calculated based on the neighborhood joining algorithm. For all PeroxiBase-data the data base IDs are presented in the labels. The numbers represent bootstrap values. Maximum parsimony and minimum evolution trees are shown in the additional files 3 and 4.