Fig. 2

Phylogenetic relationships, gene structure and architecture of conserved protein motifs in CPK genes from pineapple. The phylogenetic tree was constructed based on the full-length sequences of pineapple CPK proteins using MEGA 5 software. Details of clusters are shown in different colors. a Exon-intron structure of pineapple CPK genes. b Motif composition of pineapple CPK proteins. The motifs, numbers 1–10, are displayed in different colored boxes. The length of protein can be estimated using the scale at the bottom