Predicted secondary structures of protozoan SRP RNA Alu domains. Members of the groups Euglenozoa, Alveolata, and Fungi/Microsporidia are shown. The conserved UGUNR motif characteristic of the Alu domain is indicated by shading. Model of E. cuniculi is highly tentative. The complete structures including the S domain are shown in the web supplement at http://bio.lundberg.gu.se/srp03/.