Alignment of Daphnia pulex p75NTR to other p75NTRs and frog NRH1. Dappu- (Daphnia pulex), Mouse (Mus musculus), Frog (Xenopus leavis), Sea Urchin (Strongylocentrotus purpuratus), Lottia (Lottia gigantea) and Capitella (Capitella Sp. I). Identical residues are marked by an asterisk. Conserved Cysteines in the "Cys Rich Domain" (CRD) that defines TNFRSF members are highlighted in grey. The transmembrane domain is underlined. The death domain is highlighted in grey.