Suppression

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suppression

[sə′presh·ən]
(computer science)
Removal or deletion usually of insignificant digits in a number, especially zero suppression.
Optional function in either on-line or off-line printing devices that permits them to ignore certain characters or groups of characters which may be transmitted through them.
(electronics)
Elimination of any component of an emission, as a particular frequency or group of frequencies in an audio-frequency of a radio-frequency signal.

Suppression

 

in genetics, a phenomenon that prevents the appearance of a character resulting from mutation and that causes partial or complete restoration of the normal phenotype.

Intragenic suppression is caused by a second (suppressor) mutation in the same gene in which the first (direct) mutation occurred. Intergenic suppression is caused by a second mutation in other genes that are located at a considerable distance from the suppressed gene. In intragenic suppression, a protein coded by a given gene can reacquire functional activity, although its original structure, in contrast to true reverse mutation, or reversion, is not restored. In intergenic suppression, the normal phenotype may be restored in some cases owing to mutations that permit other means of metabolism which do not require the functioning of the given gene. In other cases, the normal phenotype may be restored as a result of mutations that alter the process by which the genetic information of the mutant gene is realized.

The phenomenon of suppression, first discovered in 1920 by the American geneticist A. H. Sturtevant, is used to study the genetic code and other aspects of molecular genetics.

REFERENCE

Stent, G. Molekuliarnaia genetika. Moscow, 1974. Chapter 6. (Translated from English.)

I. I. TOLSTORUKOV

References in periodicals archive ?
Only 6 of the patients with CS showed supression during HDDST (HDDST was not performed in all patients with CS).
Firstly, some major misconceptions have sprung up around the use of steroids for oestrus supression.
The Su-27SM will be able to perform not only air-to-air missions but also daytime air-to-ground and all-weather supression of enemy air defenses (SEAD) and tactical air support for maritime operations (TASMO).
Ruaidhri Conroy and Marty Re a provide a marvellous such coupling, often humorous, but mostly lurching between new world optimism and old world supression.
His ruthless supression and persecution of dissenters in the Communist bloc mark him out as a man of terror.
Incredibly, the chronicle of events and actions included murder, solicitation of murder, attempted bribery, supression of evidence, alteration of the crime scene, and the control, manipulation, and use of the media for propaganda purposes.
Efficacy of the GnRH analogue deslorelin for supression of oestrus cycles in cats.
A new feature supression tool from Algor enables engineers to selectively modify the geometry in CAD solid models by removing significant features.
Supression of rotifer populations by Daphnia: A review of the evidence, the mechanisms.
Stories of resistance by black workers and the violent supression of such resistance have, for the most part, been kept out of public records and thus generally have been overlooked by most historians.
He particularly criticized the paper for not mentioning that the shooting had been covered, "which casts this most disturbing instance of police instability and violence within the Blade-described category of supression, coverup and deceit.