Figure 4.

Phylogenetic tree showing the relationships among all MIKC-type M-domain proteins known. Genus names of species from which the respective genes were isolated are given in parentheses behind the protein names. Genes of gymnosperms are indicated by shaded boxes, and those of ferns are indicated by inverted boxes. All other genes have been isolated from angiosperms (4). The numbers next to some nodes give bootstrap percentages, shown only for relevant nodes (mainly those defining gene subfamilies). Subfamilies (4) are labeled by brackets at the right margin. They generally represent monophyletic gene clades (4), except for the subfamily of TM3-like genes, which appears here, but not in other tree constructions (4), as paraphyletic to TM8.