Figure 1.

Rice RePRPs belong to the RePRP gene family found specifically in monocot species. A, Map of gene structure, direction of transcription, and chromosomal location of the rice RePRP gene family. B, Alignment of deduced protein sequences of four RePRPs. Identical residues are highlighted in black boxes. Similar residues are indicated in gray boxes. The predicted signal peptide is underlined. C, Dendrogram showing the relationships between various RePRPs in monocot species and other PRPs in dicots. The phylogenetic tree was generated by MEGA5 analysis of full-length amino acid sequences using the neighbor-joining method. The bar beneath the dendrogram represents evolutionary distance in units of the number of amino acid substitutions per site.