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. 2021 Nov 6;9:38. doi: 10.1186/s40170-021-00267-4

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 3 — 1¹H NMR spectra of supernatant collected from a H1648 cells and b H1395 cells after incubation with glucose and glutamine for 4 h. After 4 h, 10 mL of media was collected, lyophilized, and redissolved into 0.4 mL water containing 5 mM Yb₃ for analysis by ¹H NMR (FA=45°, 9.4 T). The highlighted methyl and methine resonances are assigned to l-(blue) and d-(red) lactate. The Western blots (inset) show differences in GLO1 expression in H1648 and H1395 cells