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 ?
Much of the literature supporting menstrual suppression focuses on the negative aspects of menstruation in order to promote ECOC, almost by default.
Such arguments draw heavily on the neoliberal discourse of informed choice to legitimise the need to promote menstrual suppression to women.
The effectiveness of menstrual suppression products in terms of preventing pregnancy is very similar to regular OC pills.
Nonetheless, OC products designed for menstrual suppression are still new products that could, potentially, develop unanticipated side effects over the long-term.
By whose force or authority might menstrual suppression become the new norm?
and found that women of all ages have much to say against menstrual suppression.
Implicit in the medical model of interference in women's cycles, whether it be menstrual suppression or hormone 'replacement therapy, is the idea that women's bodies are broken and need fixing.
Until then, long-term menstrual suppression is a gamble, an experiment for convenience with unknown consequences.
Women ob-gyns under age 40 were more likely than those 40 years and older to have tried menstrual suppression (59.
These numbers indicate that women ob-gyns are very comfortable with the practice of menstrual suppression, not only as a matter of convenience for their patients or themselves, but also because suppressed ovulation can have safety benefits, such as reduced risk of ovarian cancer," notes Laura E.