Cluster analysis of the PVIP-related genes from pea, N. benthamiana, and Arabidopsis. Arabidopsis proteins translated from At5g48160 (PVIP1; 573 aa), At3g07780 (PVIP2; 566 aa), At1g14740 (protein 760 aa), At3g63500 (protein 1162 aa), and PVIPp (protein 503 aa) from P. sativum and PVIPnb (protein 549 aa) from N. benthamiana were aligned and clustered using the Clustal X program. Bootstrap values within and outside brackets correspond to calculations without and with inserted gaps, respectively, to optimize the alignment. The absence of a value indicates that the branch link is not supported by the analysis.