Fig. 1

Schematic drawing of the molecular structure of putative crustacean chemoreceptor proteins. Ionotropic Receptor (IR): co-receptor IR (co-IR), ionotropic glutamate receptor (iGluR), and tuning IR. Gustatory Receptor (GR). Epithelial sodium channel (ENaC). G Protein Coupled Receptor (GPCR). TRP channels (TRP). For coIRs and IRs: transmembrane domains (M1, M2, M3), pore loop (P), ligand binding domain (LBD) S1 and S2, amino terminal domain (ATD), intracellular domain (ICD). For TRP channels: coiled-coil domain (CC), ankyrin repeats (A), TRP domain (TRP)