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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature biotechnology 22 (2004), S. 440-444 
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] Chemical and biological labeling is fundamental for the elucidation of the function of proteins within biochemical cellular networks. In particular, fluorescent probes allow detection of molecular interactions, mobility and conformational changes of proteins in live cells with high temporal and ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Journal of neurochemistry 70 (1998), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: A serotonin 5-HT3 receptor was functionally expressed to high levels and on a large scale in mammalian cells with the Semliki Forest virus system. Conditions were optimized to maximize detergent solubilization of the receptor, while preserving ligand binding activity. An efficient one-step purification yielding ∼50% of the histidine-tagged 5-HT3 receptor was achieved with immobilized metal ion chromatography. The expressed receptor, in both membranes and purified preparations, exhibited wild-type ligand binding properties, characterized by one class of binding sites. The purity of the receptor was shown by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, yielding a single band at 65 kDa, and was confirmed by the specific ligand binding activity of ∼5 nmol/mg of protein. Deglycosylation of the receptor reduced the estimated relative molecular mass to 49 kDa. The apparent molecular mass of the functional receptor complex was determined by size exclusion chromatography to be 280 kDa, suggesting that the 5-HT3 receptor is a pentameric homooligomer. The secondary structure of the 5-HT3 receptor as determined by circular dichroism appeared to consist of mainly α-helices (50%) and β-strands (24%), with minor contributions from nonregular structure (9%). The binding of either agonist or antagonist did not alter the secondary structure of the receptor.
    Type of Medium: Electronic Resource
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