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Research Article

A Gaba/Benzodiazepine Receptor Complex from Bovine Brain: Purification, Reconstitution and Immunological Characterization

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Pages 189-200 | Published online: 26 Sep 2008
 

Abstract

A GABA/benzodiazepine receptor complex was purified from bovine cerebral cortex. The receptor fraction displayed binding sites for benzodiazepines as well as high and low affinity binding sites for GABA which are characteristics of the membrane-bound receptor. Two monoclonal antibodies of which one was directed against the 50 kd and the other against the 55 kd subunit were used for immunoprecipitation studies. Both of them were shown to quantitatively precipitate the entire receptor population. These results indicate that the binding sites for benzodiazepines and GABA (high and low affinity sites) reside on the same receptor complex containing a mixture of 50 kd and 55 kd subunits. Reconstitution of the receptor in phospholipid vesicles was achieved.

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