Figure 2From: Evolutionary expansion and functional diversification of oligopeptide transporter gene family in ricePhylogenetic relationships (a) and gene structure schematic diagram (b) for OsOPT genes. The phylogenetic tree was drawn as described in Figure 1 using SpISP4 as an outgroup. The 16 OsOPT genes from rice were clustered into six sections. The identical exon formation of OsOPT genes is connected with slashes.Back to article page