Figure 3. Transmembrane regions and phylogenetic analysis of PAL3 (A) 12 transmembrane domains of PAL3 and the mutation sites of the pal3-1, pal3-2 and pal3-4 mutants; (B) Phylogenetic analysis of PAL3 and its homologs. The phylogenetic analysis was carried out by MEGA X with 1 000 bootstrap replicates and was constructed using the distance method with maximum likelihood.