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Table 1 Qualitative β-galactosidase assays

From: DNA watermarks in non-coding regulatory sequences

promoter qualitative β-galactosidase assay
lac +
lac K5 +
lac II -
  1. lac wt: the wild type lac promoter
  2. lac K5: the lac promoter containing the watermark sequence WWU
  3. lac II: the lac promoter containing the watermark sequence 42
  4. +: promoter is active
  5. -: promoter is inactive