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Unrooted phylogenetic tree representing relationships among WRKY domains of pepper and Arabidopsis. The amino acid sequences of the WRKY domain of all CaWRKY and AtWRKY proteins were aligned with Clustal W and the phylogenetics tree was constructed using the neighbor-joining method in MEGA 6.0. Group I 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.
