The repressor will then bind to the operator, stopping the manufacture of lactase. In molecular genetics, a repressor is a DNA- or RNA-binding protein that inhibits the expression of one or more genes by …

Jan 21, 2026 · Repressors are proteins that turn off or reduce gene expression, which is reflected by reduced messenger RNA production from the affected gene. Repressor proteins typically function …

The meaning of REPRESSOR is one that represses; especially : a protein that is determined by a regulatory gene, binds to a genetic operator, and inhibits the initiation of transcription of messenger …

Transcriptional repressors can bind to promoter or enhancer regions and block transcription. Like the transcriptional activators, repressors respond to external stimuli to prevent the binding of activating …

Repressors are specialized molecular entities, predominantly proteins, though some RNA molecules also exhibit similar functions. They bind to specific sequences within DNA or RNA. Their primary role …

A repressor is a molecule that blocks the access of RNA polymerase to target promoters, thereby preventing gene expression. It can also alter the structure of a chromosome segment or stop the …

RNA synthesis is blocked by the presence of the repressor on the DNA strand. When the amino acid is not present, the repressor dissociates from the operator and RNA synthesis proceeds.