Phylogenetic relationships, exon-intron structure, and motif structures of caleosin genes. (A) The neighbor-joining (N-J) phylogenetic tree was constructed based on a complete protein sequence alignment of 84 caleosin genes identified using Clustal X and MEGA5. Numbers at the nodes represent bootstrap support (1000 replicates). The color of subclades indicates the five corresponding gene subfamilies. (B) Exon-intron structures of the caleosin genes. Boxes: exons; lines: introns. The lengths of boxes and lines are scaled based on gene length. (C) MEME motif search results. Conserved motifs are indicated in numbered color boxes.