Phylogenetic tree analysis of the Amt family. This figure shows the result of phylogenetic tree analysis of Amt, an example of the 162 families in the Medicago truncatula transporter database. Individual members of the Amt family were further clustered and color-coded based on the result of phylogenetic analysis and TC numbering system. M. truncatula Amts can be classified into two groups: Amt1 and Amt2. Green markers refer to Arabidopsis thaliana sequences. Red markers refer to M. truncatula sequences. Each group contains links to individual protein pages.