inducer
a small molecule that induces transcription from an operon
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Inducer
A chemical or physical agent that turns on gene expression. Usually refers to an agent that alters repressor-operator interactions, often by decreasing DNA-binding.
inducer gene - gene encoding the repressor protein of the lac operon; when lactose binds the repressor protein, the lac operon is induced.
Inducer A small molecule that binds to a repressor and alters its interaction with an operator.
The inducer:
A.
combines with a repressor and prevents it from binding to the promoter.
inducere, to induce]
(1) The ability of one group of embryonic cells to influence the development of another.
If an inducer, a molecule that initiates the gene expression, is present, then it can interact with the repressor protein and detach it from the operator. RNA polymerase then can transcribe the message (expressing the gene).
Origin: L. Inducere, inductum; pref. In- in _ ducere to lead. See duke, and cf. Induct.
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Our results demonstrate that, in the presence of an inducer, the repressor's N-termini crosslink to the operator's outermost nucleotides.
p53 is a potent inducer of apoptosis. Is it any wonder that mutations in the p53 gene, producing a defective protein, are so often found in cancer cells (that represent a lethal threat to the organism if permitted to live)?
Genes which code for enzymes necessary for the digestion of maltose are regulated by this mechanism. Maltose acts as the inducer, binding to an activator and then to mRNA. The activator bound to mRNA stimulates the binding of RNA polymerase.
AIDS is a disease where specific immune cells such as helper-T and inducer-T cells are killed. Without those cells, the immune system cannot work properly and even minor diseases can kill the organism.
 See also: Trans, Cells, Molecule, DNA, Action
  
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