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Measurement of the rate of substrate cycling between fructose 6-phosphate and fructose 1,6-bisphosphate in skeletal muscle by using a single-isotope technique.

By R A Challiss, J R Arch, B Crabtree and E A Newsholme


The effects of several agents on the rates of the fructose 6-phosphate/fructose 1,6-bisphosphate substrate cycle were measured in incubated epitrochlearis muscles of the rat by monitoring the transfer of radiolabel from [6-14C]glucose to the 1-position of glucose residues in glycogen. The cycling rates observed were almost identical with those previously obtained by using the well-established dual-isotope technique. In particular, it was found that the beta-adrenoceptor agonist isoprenaline increased the cycling rate about 12-fold

Topics: Research Article
Year: 1984
DOI identifier: 10.1042/bj2230849
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Provided by: PubMed Central
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