Figure 3

Phylogeny of plant HyPRPs. An unrooted phylogenetic tree, constructed by the NJ method using Treecon (see Materials and Methods) from amino acid sequences of C-terminal domains of HyPRPs from seven plant species (At – Arabidopsis thaliana, Le – Lycopersicum esculentum, Mt – Medicago truncatula, Os – Oryza sativa, Pt – Pinus taeda, St – Solanum tuberosum, Zm – Zea mays). Arabidopsis loci are denoted by standard AGI locus identifiers, rice loci by a shortened version of the TIGR Rice genome annotation identifiers (i.e. Os02g44310 stands for LOC_Os02g44310 etc.). Symbols at branches denote bootstrap values (out of 500 replicates), red symbols denote branches which had bootstrap support over 50 % also in a ML tree from the same input data. The NJ and ML trees agreed in all clades with bootstrap support over 50 % with exception of the ML tree (i) swapping Pt2 and Pt13, (ii) clustering together Zm25 and Zm40, (iii) clustering together Mt11 an Mt5, (iv) clustering Zm 19 with the Zm33/Zm45 pair, and (v) locating Os04g46830 into the cluster containing Zm47. Sequences are color-coded as in Figures 1 and 2: "Standard" proline-rich N-terminal domains are shown in black (long ones in bold), glycine-rich N-terminal domains in green, proline- and glycine-rich N-terminal domains in blue, N-terminal domains shorter than 10 amino acid residues are in red, truncated N-termini are denoted by an asterisk; chromosomal clusters and tandem duplications in Arabidopsis (squares) and rice (circles) are marked to the right of the tree. Chromosomal clusters are numbered according to their chromosomal positions (i.e. 10a and 10b means the two clusters on rice chromosome 10).