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. 1995 Apr;68(4 Suppl):191S-192S; discussion 192S-193S.

A new method for the time-resolved measurement of phosphate release in permeabilized muscle fibers

M A Ferenczi  1 , Z H He, R K Chillingworth, M Brune, J E Corrie, D R Trentham, M R Webb
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A new method for the time-resolved measurement of phosphate release in permeabilized muscle fibers

M A Ferenczi et al. Biophys J. 1995 Apr.

Abstract

A new method for the measurement of phosphate release in contracting and relaxed permeabilized muscle fibers is described. The assay is based on a genetically engineered phosphate-binding protein labeled with a coumarin fluorescent probe, which binds inorganic phosphate tightly and shows a fourfold increase in fluorescence upon binding. Measurements of Pi release on the millisecond time scale with sensitivity in the 10 microM range are obtained that provide new information about the relationship between ATP hydrolysis and force production.

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References

    1. Biochemistry. 1994 Jul 12;33(27):8262-71 - PubMed
    1. J Physiol. 1994 Jan 15;474(2):303-17 - PubMed

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