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Mean TPMs of genes encoding the NirK and cNOR gene clusters in N. europaea. The fold changes of gene transcription between NH3- versus O2-limited growth are given in parentheses. Error bars represent the standard deviations between replicate samples (n = 3) for each growth condition. A Welch’s t test was used to determine significantly differentially transcribed genes. *, P < 0.05; **, P < 0.01. For gene annotations refer to Table S2.
