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. 2022 Oct 17;13:6115. doi: 10.1038/s41467-022-33872-y

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Fig. 1 — a Conversion of C₃H₈ to CO₂, b ¹³C₃H₈ to ¹³CO₂, c NO₃⁻ to NH₄⁺ and N₂ with transitory formation of NO₂⁻, d ¹⁵NO₃⁻ to ¹⁵NH₄⁺ and ²⁹N₂ with transitory formation of ¹⁵NO₂⁻. Source data are provided as a Source Data file.