<prompt> Benzodiazepine binding site on GABA receptors is on ?y-subunita-subunitb-subunitd-subunit  <response>: Ref: GoodmanGillman REF : katzung pharmacology : 14th ed The exact subunit structures of native GABA receptors are still are unknown, but it is thought that most GABA receptor are composed of alpha, beta gamma subunits that Coassemble with some unceain stoichiometry. Binding site of GABA is on beta-subunit. Benzodiazepine site is located on the a subunit but the stabilization or completion of that site in the assembled. Structure also requires the y subunit. 