A neighbor-joining (NJ) distance tree for Tic40 homologs in the Brassicaceae. The full-length ORF sequences of Tic40 homologs were used for phylogenetic analysis using MEGA4.0 (Tamura et al., 2007). Bna, B. napus; Bol, B. oleracea; Bra, B. rapa; Bni, B. nigra; At, A. thaliana; Aly, A. lyrata; Cru, C. rubella; Tha, T. halophila. The numbers on nodes are bootstrap values.