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. 2019 Jun 10;9:8388. doi: 10.1038/s41598-019-44640-2

Figure 5.

Figure 5

The detection of the integron GCs by using pBiDiPD. (a) pBiDiPD Transformants on LB agar supplemented with chloramphenicol, X-gal/IPTG and 4-methylumbelliferyl β-D-glucuronide (MUG), (b) Blue-white screening to detect for the clones with promoter activity on the antisense strand, (c) Exposing the colonies under the UV light to detect clones with promoter activity on the sense strand. The positive (+) and negative (−) colonies were the E. coli containing pCC1BAC-lacZα-TMB4-PC-gusA (with experimentally proven promoter activities on either strand of DNA and pCC1BAC-lacZα-gusA (no promoter activity), respectively.