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  • Title: Immunochemical detection and quantitation of brown adipose tissue uncoupling protein.
    Author: Henningfield MF, Swick RW.
    Journal: Biochem Cell Biol; 1987 Mar; 65(3):245-51. PubMed ID: 3580174.
    Abstract:
    A polyclonal antisera against rat brown adipose tissue mitochondrial uncoupling protein was used to examine mitochondrial samples from liver and white and brown adipose tissue from several mammalian species. A sodium dodecyl sulfate--polyacrylamide gel electrophoretic separation of proteins combined with an immunochemical method allowed for visualization of antigen--antibody complexes on nitrocellulose blots. Hamster, cavy, monkey, and mouse brown adipose tissue mitochondrial samples cross-reacted with the antisera. Mitochondria prepared from white fat obtained from young swine and sheep contained two closely migrating, antigenically active proteins. Hepatic mitochondria samples did not contain antigenically active protein. Reflectance densitometry was used for quantitation of the uncoupling protein in various mitochondrial samples. In rats fed diets low in protein, there appears to be a dissociation between the concentration of uncoupling protein and the number of nucleotide binding sites as given by the [3H]GDP binding assay. These results are indicative of a physiological activation of the uncoupling protein.
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