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. 2020 Apr 21;52(5):711–724. doi: 10.1007/s00726-020-02845-0

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© The Author(s) 2020

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Fig. 6 — Glycine and valine uptake and release in equine erythrocytes (n = 3) during media cycling. Tyrosine was not included in the AA-PBS medium and the erythrocyte levels are shown as a base reference to indicate no oscillations