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. 2018 Jul 17;9:1576. doi: 10.3389/fmicb.2018.01576

FIGURE 4.

FIGURE 4

Comparison showing the significantly greater (p < 0.05) ratio of gene copy numbers of bmoX/16S rRNA gene in unfractionated DNA from gas field soil samples (G) than that from non-gas field soil samples (NG) after incubated with butane for 9, 12, and 14 days. Data are averages of three replicates. Error bars represent SD, some error bars are smaller than the symbols.