Fig. 3

Similarities among 5′ variable cassettes of sDscam genes in representative species from each of the major Chelicerata clades. a Heatmap of pairwise sequence identities of the duplicated cassettes encoding the Ig1 domain of sDscamα isoforms from Metaseiulus occidentalis (Moc), Ixodes scapularis (Isc), Mesobuthus martensii (Mma), Stegodyphus mimosarum (Smi), and Limulus polyphemus (Lpo). To simplify visualisation, the cassette repeats are depicted in the heatmaps in the same linear order in which they reside in each gene. b Heatmaps of the percent identities of the duplicated cassettes encoding Ig1 + 2 domains of sDscamβ in Chelicerata species. The order of the cassettes in the heatmap corresponds to the linear order of each cassette in the genome. c Phylogenetic tree for the 268 duplicated cassettes encoding Ig1 domains of sDscamα. The support values at the nodes are bootstrap values relative to 1000 replicates. Numbers in parentheses refer to the number of 5′ variable cassettes of the corresponding gene. Clades were collapsed for visualisation convenience. d Phylogenetic tree for the 243 duplicated cassettes encoding Ig1 + 2 domains of sDscamβ. Collapsed clades plus crosses are depicted as a combined clade composed of these duplicated cassettes from different species