Fig. 1

Distinguishing intron loss and gain in Dictyostelium discoideum and Dictyostelium purpureum. The phylogenetic tree was adapted from DictyBase [70] and is scaled according to phylogenetic distances. Dollo parsimony was used to distinguish intron loss and gain. Examples of intron loss and gain in Dictyostelium discoideum are shown using “+” and “−” represent the presence and the absence of an intron in a given position, respectively