Attenuation

(noun)

Attenuation (in genetics) is a proposed mechanism of control in some bacterial operons that results in premature termination of transcription. It is based on the fact that, in bacteria, transcription and translation can and do proceed simultaneously.

Related Terms

Examples of Attenuation in the following topics:

  • Attenuation

    • Attenuation is a mechanism utilized by bacteria to regulate unnecessary gene expression.
    • Attenuation is a regulatory mechanism used in bacterial operons to ensure proper transcription and translation.

  • Regulation by Biosynthetic Enzymes

    • Attenuation is a regulatory feature found throughout Archaea and Bacteria domains which causes premature termination of transcription.
    • Attenuation involves a provisional stop signal (attenuator), located in the DNA segment that corresponds to the leader sequence of mRNA.
    • Attenuation is a regulatory feature found throughout Archaea and Bacteria causing premature termination of transcription.
    • Attenuator is a nucleotide sequence in DNA that can lead to premature termination of transcription.
    • Attenuators may be classified according to the type of molecule which induces the change in RNA structure.

  • Introduction to Property Rights and Markets

    • Attenuated or weakened property rights also may distort information about MB and/or MC and result in an allocation that is less than optimal.

  • The Role of Attention in Memory

    • Attenuation theory, a revision of the filter model, proposes that we attenuate (i.e., reduce) information that is less relevant but do not filter it out completely.
    • Attenuation theory differs from late-selection theory, which proposes that all information is analyzed first and judged important or unimportant later; however, this theory is less supported by research.

  • Geodesic distance, eccentricity, and diameter

    • If A sends 6 units to B, and B sends 4 units to C, the "strength" of the path from A to C (assuming A to B to C is the shortest path) is 4.Where we have a measure of the cost of making a connection (as in an "opportunity cost" or "transaction cost" analysis), the "distance" between two actors is defined as the sum of the costs along the shortest pathway.Where we have a measure of the probability that a link will be used, the "distance" between two actors is defined as the product along the pathway -- as in path analysis in statistics.The Nearness Transformation and Attenuation Factor parts of the dialog allow the rescaling of distances into near-nesses.