Biochem J. 1989 Aug 15;262(1):261-9.

Measurement of the acyl-CoA intermediates of beta-oxidation by h.p.l.c. with on-line radiochemical and photodiode-array detection. Application to the study of [U-14C]hexadecanoate oxidation by intact rat liver mitochondria.

Watmough NJ, Turnbull DM, Sherratt HS, Bartlett K.

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Department of Neurology, University of Newcastle upon Tyne, U.K.

Abstract

The quantitative isolation of acyl-CoA esters of chain length C2-C17 from mitochondrial incubations and their analysis by reverse-phase radio-h.p.l.c. is described. Photodiode-array detection was used to characterize 2-enoyl-CoA esters. The chromatographic behaviour of all 27 intermediates of the beta-oxidation of hexadecanoyl-CoA is documented. Only C16, C14 and C12 intermediates were detected in uncoupled mitochondria oxidizing [U-14C]hexadecanoyl-CoA in the presence of fluorocitrate and carnitine, providing evidence for some organization of the enzymes of beta-oxidation [Garland, Shepherd & Yates (1965) Biochem. J. 97, 587-594; Sumegi & Srere (1984) J. Biol. Chem. 259, 8748-8752]. Rotenone increased concentrations of 3-hydroxyacyl-CoA and 2-enoyl-CoA esters and inhibited flux. These experiments provide the first direct unambiguous measurements of acyl-CoA esters in intact respiring rat liver mitochondrial fractions.

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PMCID:: PMC1133256

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Measurement of the acyl-CoA intermediates of beta-oxidation by h.p.l.c. with on-...
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Measurement of the acyl-CoA intermediates of beta-oxidation by h.p.l.c. with on-line radiochemical and photodiode-array detection. Application to the study of [U-14C]hexadecanoate oxidation by intact rat liver mitochondria.

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