Isolation of Putative Benzodiazepine Receptors from Rat Brain Membranes by Affinity Chromatography
- 1 January 1982
- journal article
- research article
- Published by Wiley in Journal of Neurochemistry
- Vol. 38 (1), 15-19
- https://doi.org/10.1111/j.1471-4159.1982.tb10848.x
Abstract
The benzodiazepine receptor from rat brain was solubilised and purified 5200-fold by affinity chromatography. The affinity column contained an immobilized benzodiazepine (delorazepam) and biospecific elution with 6 mm-chlorazepate was achieved. The purified receptor is apparently homogeneous in SDS-polyacrylamide gel electrophoresis. The native protein had a molecular weight of 240,000, and the subunit one of 60,000. The dissociation constant (KD) is 8 nm for [3H]diazepam. A correlation exists between the value of affinity obtained for benzodiazepine derivatives and their known pharmacological effectiveness.Keywords
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