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 ?
And the suppressed setting, on an un-suppressed firearm, actually caused malfunctions.
The previously endorsed practice of holding off on providing the advice of rights to an arrestee with a follow-up "warned" interview, viewed by some as an effective interrogation tactic, will lose its effectiveness when the confession is suppressed.
With Viramune we had only seven people out to week 24, but those seven also remained suppressed with viral load under 50 copies.
Dr White said: ``It is quite clear that some letters were deliberately suppressed.
Such limitation is increasingly important in urban grids where large fault currents, or current surges, arising from accidental, but common, short circuits can destroy power equipment if they are not adequately suppressed.
People who had suppressed compassion did, apparently, have a change in their sense of morality: they were much more likely to either care less about being moral or to say that it's all right to be flexible about following moral rules.
In the intestines, the antibiotic suppressed natural, protective microbes, while the invading drug-resistant bacteria thrived, he says.
Assuming similar optical properties of biomass smoke in Southeast Asia and Brazil, where UV-B and optical depth are highly correlated, optical depth measurements over Thailand and Vietnam by NASA's Terra and Aqua satellites suggest highly suppressed UVB during these avian influenza outbreaks (Mims FM III, unpublished data).
The defendant argued that the handgun should be suppressed as the search went beyond what can be done incident to arrest given he was not in the vehicle at the time the officer initially encountered him.
Instead, this trial started with the observation that when HIV is very well suppressed by antiretrovirals, and the treatment is interrupted, it usually takes 2-3 weeks for detectable virus to return.
Deepti Gupta died should be suppressed because the 33-year-old Glendale woman was cremated before a defense witness could examine her.
Given what we do know, even in the best situation of patients who have been suppressed below [quantification levels of] the most sensitive assay for 3 to 4 years, when we look in their cells and other compartments there is still virus.