LRR XII-L of Pac compared with Arabidopsis RLK/Pelle subfamily LRR XII. A Neighbor-joining tree of the aa sequences of LRR XII-L of Pac (pac, ♦), the complete set of LRR XII of Arabidopsis (◊), two well-known members of LRR XII of rice – Xa21 and Xa26 (◊), and isotigs extracted from a 454 transcriptome dataset of Pac which have LRR signatures located upstream the kinase domain (black star) (Additional file 5). Analysis was based on the kinase domain region spanning subdomain I/II up to the beginning of VIII. See caption of Figure 1 for additional details on the representation of the tree. B Multiple alignment of the RD motif (shaded grey) and non-RD motif (shaded black) corresponding to the sequences included in the tree.