Structure of the nicotinic acetylcholine receptor (nAchR: PDB 2BG9) which is very similar to the GABAA receptor.[1][2][3] Top: side view of the nAchR imbedded in a cell membrane. Bottom: view of the receptor from the extracellular face of the membrane. The subunits are labeled according to the GABAA nomenclature and the approximate locations of the GABA and benzodiazepine (BZ) binding sites are noted (between the α- and β-subunits and between the α- and γ-subunits respectively).
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