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Figure 3


Fig. 3. 5-HT1{alpha} receptors contain key structural elements typical of the 5-HT receptor superfamily and are conserved among arthropods. Predicted protein sequences of 5-HT1{alpha} from Panulirus and Procambarus are aligned with their orthologs from Drosophila, Heliothis and Papilio and the human 5-HT1A receptor. Residues identical to the 5-HT1{alpha}Pro sequence are boxed with thin lines. Transmembrane domains are indicated with black bars above the sequence and the reference residue for numbering in each is shaded (see Results). Black ovals surround amino acids important for 5-HT ligand binding. Grey boxes surround areas important for G protein coupling or activation. Asterisks above the sequences indicate consensus sites for N-linked glycosylations in crustacean sequences.





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