Fig. 4.

Phylogenetic relationships, gene structure, and architecture of conserved protein motifs in CUC genes from Cucurbita pepo and Arabidopsis thaliana. (A). Phylogenetic tree constructed based on the CUC full-length protein sequences. (B) Exon–intron structure of CUC genes. (C) Schematic representation of the conserved motifs in CUC proteins. Motifs 1 and 2 comprise the NAC domain of this family of transcription factors. Motifs 4, 5, and 6 correspond to motifs I, II, and III in Adams et al. (2011).