Fig. 3From: The evolution of the metazoan Toll receptor family and its expression during protostome developmentNumber of TLRs in species included in the genome/transcriptome analyses. In general, the number of TLRs in spiralians (purple) is higher and more variable between species when compared to ecdysozoans (magenta). Species for which TLRs were not detected are excluded from the graphBack to article page