Maximum likelihood phylogeny of Arabidopsis MSTproteins. An unrooted phylogeny of the 53 Arabidopsis MST protein sequences inferred using maximum likelihood. The tree was produced using PHYML with the JTT amino acid substitution model, a discrete gamma model with four categories and an estimated shape parameter of 1.385. Bootstrapping was performed with 100 replicates. Bootstrap values for each subfamily clade are highlighted in yellow. Call-outs show available information about the function and expression of some MST genes, from Arabidopsis and other taxa, within each subfamily.