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2. Silencer (genetics) - Wikipedia

   en.wikipedia.org/wiki/Silencer_(genetics)

   1: RNA Polymerase, 2: Repressor (LacI), 3: Promoter, 4: Operator, 5: Lactose, 6: lacZ, 7: lacY, 8: lacA. Top: lac operon is initially repressed because lactose is not present to inhibit the repressor. Bottom: Repressor LacI is inhibited because it binds to lactose and transcription of the lac operon is initiated for the breakdown of lactose.

3. Kruppel-like factors - Wikipedia

   en.wikipedia.org/wiki/Kruppel-like_factors

   KLFs are divided into three subgroups; Group 1 (KLF 3,8, and 12) are repressors via interaction with the C-terminal Binding Protein 1 and 2 (CtBP1 and CtBP2). Group 2 (KLFs 1,2,4,5,6, and 7) are transcription activators. Group 3 (KLFs 9,10,11,13,12, and 16) have repressor activity via interaction with the common transcriptional co-repressor ...

4. Activator (genetics) - Wikipedia

   en.wikipedia.org/wiki/Activator_(genetics)

   A transcriptional activator is a protein (transcription factor) that increases transcription of a gene or set of genes. [1] Activators are considered to have positive control over gene expression, as they function to promote gene transcription and, in some cases, are required for the transcription of genes to occur.

5. Transcription coregulator - Wikipedia

   en.wikipedia.org/wiki/Transcription_coregulator

   Transcription factor glossary; gene expression – the process by which information from a gene is used in the synthesis of a functional gene product such as a protein ...

6. Repressor - Wikipedia

   en.wikipedia.org/wiki/Repressor

   A repressor that binds with a co-repressor is termed an aporepressor or inactive repressor. One type of aporepressor is the trp repressor , an important metabolic protein in bacteria. The above mechanism of repression is a type of a feedback mechanism because it only allows transcription to occur if a certain condition is present: the presence ...

7. Regulatory sequence - Wikipedia

   en.wikipedia.org/wiki/Regulatory_sequence

   An inactive enhancer may be bound by an inactive transcription factor. Phosphorylation of the transcription factor may activate it and that activated transcription factor may then activate the enhancer to which it is bound (see small red star representing phosphorylation of a transcription factor bound to an enhancer in the illustration). [12]