A Transcription Regulation Process in Which the Presence of One Carbon Source Leads to a Decrease in the Frequency Rate or Extent of Transcription of Specific Genes Involved in the Metabolism of Other Carbon Sources. Carbon Catabolite Repression Is a Mechanism of Genetic Regulation Which the Accumulation of Catabolites of One Substance in the Cell Represses the Formation of Enzymes That Contribute to the Catabolism of Other Substances.
The Living Contents of a Cell; the Matter Contained Within (but Not Including) the Plasma Membrane Usually Taken to Exclude Large Vacuoles and Masses of Secretory or Ingested Material. in Eukaryotes It Includes the Nucleus and Cytoplasm.
Interacting Selectively and Non Covalently with a Nucleotide Any Compound Consisting of a Nucleoside That Is Esterified with (ortho)phosphate or an Oligophosphate At Any Hydroxyl Group On the Ribose or Deoxyribose.
Transcription Factor Activity Sequence Specific DNA Binding
Interacting Selectively and Non Covalently with a Specific DNA Sequence in Order to Modulate Transcription. the Transcription Factor May or May Not Also Interact Selectively with a Protein or Macromolecular Complex.