Figure 8.

Three-dimensional structure of the agonist (glutamate) bound form of the AMPA receptor (a ligand-gate ion channel or ionotropic receptor). Structure [PDB ID 1P93 (Twomey et al., 2017)] is shown with the receptor shown covered with a semi-transparent gray surface and the secondary protein structure indicated; ligands are highlighted as darker solid CPK structures (inset shows a section around the bound ligand as an enlargement). As before, the ligands are faded as they buried inside the receptors and are obscured by the covering surfaces.