Comparison of glutathione peroxidase amino acid sequences. A: Amino acid sequence alignment of GPx from Arabidopsis thaliana (At), Selaginella moellendorffii (Sm), Physcomitrella patens (Pp) and Chlamydomonas reinhardtii (Cr). B: Phylogramme of the GPx sequences shown in Fig. 14A (red) and a selection of plant GPx full length sequences listed in PeroxiBase . For all PeroxiBase-data the data base IDs are presented in the labels. The tree was calculated based on the neighborhood joining algorithm. The numbers represent bootstrap values. Maximum parsimony and minimum evolution trees are shown in the additional files 9 and 10.