Figure 1

Distribution of ancient kinesin paralogs in 45 diverse eukaryotes. Using the results of our comprehensive kinesin motor domain phylogeny (Additional file 2) we identified 51 kinesin paralogs, encompassing 17 kinesin families and 34 subfamilies. Presence of paralog(s) in a genome is indicated by a filled circle, absence/not-found is indicated by an open circle. Only paralogs from well-supported nodes were considered (p > 0.95 by both aLRT methods; see Additional file 2). Dark blue circles indicate presence of members of a full kinesin family (corresponding to the deepest well-supported nodes for kinesin groups containing sequences from eukaryotes belonging to more than one eukaryotic "supergroup"), whilst subfamily paralogs are indicated by light blue circles beneath (suffixed A, B, C etc.). Kinesins falling within a particular kinesin family, but outside of all the contained well-supported subfamilies are suffixed '-X' (e.g. Kinesin-1-X). Groups of kinesins that do not have sufficient membership to be considered full kinesin families (see Results and Discussion) are numbered X1 to X14 (green circles). Species analyzed are grouped into higher taxonomic groups. Paralog families used in Dollo parsimony analyses are marked 'c' (character) adjacent to the first column.