Unrooted phylogenetic tree representing relationships among WRKY domains of cucumber and Arabidopsis. The amino acid sequences of the WRKY domain of all CsWRKY and AtWRKY proteins were aligned with Clustal W and the phylogenetic tree was constructed using the neighbor-joining method in MEGA 4.0. Group 1 proteins with the suffix 'N' or 'C' indicates the N-terminal WRKY domains or the C-terminal WRKY domains. The red arcs indicate different groups (or subgroups) of WRKY domains. Diamonds represent orthologs from cucumber (blue) and Arabidopsis (red).
Ling et al. BMC Genomics 2011 12:471 doi:10.1186/1471-2164-12-471