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. 2020 Feb 1;9(2):340. doi: 10.3390/cells9020340

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Representative respiration curve after the complete oxidation of a limited quantity of palmitoyl-l-carnitine. The black curve—oxygen consumption, the blue curve—oxygen consumption derivative. Additions: O—skinned rat cardiac fibers (registration of respiration on endogenous substrates), then A1—1.6 nmol of palmitoyl-l-carnitine, A2—pyruvate + malate (6 mM + 6 mM, respiration rate: 24.8 nmol/O/min/mg dry weight), A3—10 µM ADP (respiration rate: 32 nmol/O/min/mg dry weight), A4—1.2 mM ADP (respiration rate: 57.7 nmol/O/min/mg dry weight).