Abstract
Three distinct types of detergent have been found to be capable of solubilizing muscarinic binding activity from the rat forebrain. These are: (a) the alkylpolyoxyethylenes such as Lubrol PX [1]; (b) steroids such as cholate [2, 3], digitonin [4, 5] and the cholate sulphobetaine derivative CHAPS [6]; and (c) lysophosphatidylcholine [7]. In such studies, it has proved convenient to compare the overall yield of solubilized receptors from brain membranes (P2 and P3) pre-labelled with the irreversible alkylating affinity label [3H]propylbenzilylcholine (3H-PrBCM) [8] with the yield of active binding sites which can be assayed in the supernatant after extraction of non-pre-labelled membranes. Solubilized binding sites were conveniently measured by incubating 600,000 g-min supernatants with receptor-saturating concentrations (3 × 10-8 M) of (-)-N-[Me-3H]- scopolamine (3H-NMS) or (-)-[3H]quinuclidinyl-benzilate (3H-QNB), followed by separation of bound from free ligand by rapid gel filtration on small columns of Sephadex G-50 M [3].
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© 1984 Plenum Press, New York
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Hulme, E.C., Birdsall, N.J.M., Berrie, C.P., Haga, T., Stockton, J.M. (1984). Solubilization and Characterization of Muscarinic Acetylcholine Receptors. In: Reid, E., Cook, G.M.W., Morré, D.J. (eds) Investigation of Membrane-Located Receptors. Methodological Surveys in Biochemistry and Analysis, vol 13. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-4631-9_46
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DOI: https://doi.org/10.1007/978-1-4684-4631-9_46
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