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Phylogenetic tree of angiosperm PRR genes. Amino acid sequences were aligned using TCoffee program [47]. The phylogenetic tree was reconstructed by the ME method from the numbers of amino acid substitutions estimated by the JTT model. PRR1/TOC1 genes were utilized as an outgroup in the phylogenetic trees. The numerals at the branch indicate bootstrap values calculated by the ME method with 1,000 replications. Bootstrap values >50% are shown.
