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An unrooted phylogenetic tree of the NAC transcription factors of rice and Arabidopsis. The amino acid sequences of the NAC domain of 135 rice NAC family proteins and 117 Arabidopsis NAC proteins were aligned by ClustalW, and the phylogenetic tree was constructed using MEGA 4.0 and the NJ method. Bootstrap values from 1000 replicates were used to assess the robustness of the trees. The classification by Nuruzzaman et al. (2010) is indicated in parentheses.
