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    • Figure 1. 

      Gal80 interaction with other genes in the GAL system. When galactose is present, it activates GAL3. GAL3 binds to GAL80 and detaches it from GAL4, and GAL4 initiates transcription. When galactose is not used as a source of energy, the GAL80–GAL3 interaction does not happen, and therefore, GAL80 inhibits GAL4 to start transcription[25].

    • Figure 2. 

      Gal80 genetic position in the S. cerevisiae chromosome[27].