(B). Phylogenetic tree of the ALOG domain, domain architectures, and structure of the ALOG containing DIRS-1 transposon. The tree was reconstructed using an approximately maximum-likelihood method implemented in the FastTree 2.1 program (see Material and methods). Clades with boostrap values equal to or above 80% are marked with a red circle. Well-supported clades are collapsed and shown as triangles, which are colored based on their phyletic patterns (shown in the key below). The higher-order relationships should be viewed with caution due to the shortness of the alignment. Phyletic patterns of the collapsed clades are shown next to the clade name in brackets. Species abbreviations are as in Figure 1. For complete details, refer to the supplement. Also shown is the structure of the complete transposon extracted from the Ectocarpus genome. Domains in the architectures are not drawn to scale. X refers to an uncharacterized domain.