Figure 3.
(Left) Illustrating the selectivity filter, S5–S6 linker, and S6 fold according to the homology model. The single and double substitutions studied are shown at predicted positions on the backbone fold (solid strand). (Right) Illustrating the complete construct with the 12 rat residues substituted in the human receptor replacing human residues with the corresponding rat residues at predicted positions according to the homology model.