Additional file 1.

A rooted phylogenetic tree representing relationships among WRKY domains of rice, cucumber and Arabidopsis. The amino acid sequences of the WRKY domain of rice WRKY (OsWRKY), CsWRKY and AtWRKY proteins were used to reconstruct a phylogenetic tree. The most primitive Giardia lamblia WRKY C-terminal domain (GlWRKY1C) was used as an outgroup. Group 1 proteins with the suffix 'N' or 'C' indicates the N-terminal WRKY domains or the C-terminal WRKY domains. Stars and black lines represent orthologous WRKY of cucumber and Arabidopsis. The tree was constructed by PHYLIP 3.2 and displayed by njplot software.

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Ling et al. BMC Genomics 2011 12:471   doi:10.1186/1471-2164-12-471