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. 2018 Jan 23;8:1401. doi: 10.1038/s41598-018-19831-y

Figure 4.

Figure 4

Promoter activity is represented by beta-galactosidase activity. Beta-galactosidase enzyme activities of variants were compared with wild-type promoter transformants, which is represented by the mean ± SD of three independent cultivations. Variants with stronger strength were marked with triangle. Relative enzyme activities of deletion variants were shown in (a) while relative enzyme activities of addition variants were shown in (b). (c) pGH expression levels were linearly related to relative beta-galactosidase activities with an R2 = 0.71.