Fig. 2

Domain architecture analyses of putative proteins belonging to the Toll and Imd pathways and the complement system in Lineus ruber. A Proteins belonging to the Toll pathway. B The Imd pathway and C the complement system. An example of each complement receptor type (CR, CRItgα, CRItgβ, and CRIg) is shown. For other complement receptor proteins identified in this study, see Additional file 5: Fig. S2. Numbers indicate the length of the protein in amino acids. Asterisks after the amino acid number indicate partial proteins. A2M, α2-macroglobulin family domain; ANATO, anaphylatoxin homologous domain; ANK, ankyrin domain; CASc, caspase domain; CCP, complement control protein; DED, death effector domain; EGF, epidermal growth factor domain; Ig, immunoglobulin domain; Intα, integrin-α domain; Intβ, integrin-β domain; Intβt, Integrin-β tail domain; IPT, Ig-like, plexin, transcription factors domain; PGRP, peptidoglycan recognition protein domain; RHD, Rel homology domain; SerThrK, serine/threonine protein kinase domain; TED, thioester domain; TIR, Toll-interleukin 1 receptor domain; TrypSP, trypsin-like serine protease domain; vWA, von Willebrand factor type A domain. Small blue and red bars represent coiled coils and signal peptides, respectively. Blue rectangles represent the transmembrane domains