repressor
121Coactivator (genetics) — A coactivator is a protein that increases gene expression by binding to an activator (or transcription factor) which contains a DNA binding domain. The coactivator is unable to bind DNA by itself.[1][2][3] The coactivator can enhance… …
122Insulator (genetics) — For electrical insulator, see Insulator (Electrical). For other uses, see Insulation (disambiguation). An insulator is a genetic boundary element that plays two distinct roles in gene expression, either as an enhancer blocking element, or more… …
123Attenuator (genetics) — The attenuator plays an important regulatory role in prokaryotic cells because of the absence of the nucleus in prokaryotic organisms. The attenuator refers to a specific regulatory sequence that, when transcribed into RNA, forms hairpin… …
124Herpes simplex virus — This article is about the virus. For information about the disease caused by the virus, see Herpes simplex. Herpes simplex virus TEM micrograph of a herpes simplex virus …
125Hedgehog signaling pathway — In a growing embryo, cells develop differently in the head or tail end of the embryo, the left or right, and other positions. They also form segments which develop into different body parts. The hedgehog signaling pathway gives cells this… …
126Sex determination and differentiation (human) — Human sex determination refers to the processes by which an individual becomes either a male or female during development.The Jost ParadigmUnder typical circumstances, the sex of an individual will be determined and expressed through the… …
127Regional specification — In the field of developmental biology, regional specification is the process by which different areas are identified in the development of the early embryo. The process by which the cells become specified differs between organisms. Contents 1… …
128Derepression — In genetics and biochemistry, a repressor gene inhibits the activity of an operator gene. By inactivating the repressor, the operator gene becomes active again. This effect is called derepression. Derepression of ALA synthase One example is the… …
