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Regulation of Gene Expression

At any given time, not all the genes of an organism will be equally active in transcription. [Pg.176]

In prokaryotes and eukaryotes, the expression of individual genes is controlled by activation or inhibition of RNA polymerase on each gene by transcription factors. [Pg.176]

Selective regulation of gene expression in prokaryotes allows the organism to respond to changing environmental factors, eg, nutrient availability, by altering the repertoire of proteins it makes. [Pg.176]

In humans, different sets of genes are turned off or on in each type of cell or tissue, both in the major process of dififerentiation, and in response to the body s more immediate physiologic needs, eg, growth, development, or disease. [Pg.177]

The lac operon has three structural genes (genes that encode protein products), the lacX, lacY, and lacK genes. [Pg.177]

Ascorbate transport is mainly controlled by carriers availability, and thus it depends on the number of SVCT proteins present in the plasma membrane (which in turn is related to enhanced synthesis, slowed degradation, activation of nonfunctional carriers or cellular redistribution), as well as their substrate affinity. So, transcriptional, translational, and post-translational modifications of SVCTs allow a fine-tuned regulation of AA uptake (Liang et al., 2002). [Pg.263]

Gene expression—cholesterol levels control the amount of mRNA. If [cholesterol] is high, levels of mRNA coding for the reductase are reduced. If [cholesterol] is low, more mRNA is made. (Regulation of gene expression is discussed in Chapter 31.)... [Pg.834]

Regulation of mRNA synthesis Regulation of gene expression... [Pg.1224]

Azzi A, Gysin R, Kempna P et al (2004) Vitamin E mediates cell signaling and regulation of gene expression. Ann N YAcad Sci 1031 86-95... [Pg.1298]

Regulation of Gene Expression with Pyrrole-Imidazole Polyamides... [Pg.121]

The processing of hnRNA molecules is a site for regulation of gene expression. Alternative patterns of RNA splicing result from tissue-specific adaptive and developmental control mechanisms. As mentioned... [Pg.354]

See other pages where Regulation of Gene Expression is mentioned: [Pg.254]    [Pg.255]    [Pg.251]    [Pg.254]    [Pg.420]    [Pg.121]    [Pg.199]    [Pg.202]    [Pg.122]    [Pg.313]    [Pg.530]    [Pg.567]    [Pg.971]    [Pg.1063]    [Pg.1093]    [Pg.1224]    [Pg.1501]    [Pg.417]    [Pg.250]    [Pg.157]    [Pg.177]    [Pg.177]    [Pg.122]    [Pg.150]    [Pg.160]    [Pg.9]    [Pg.374]    [Pg.374]    [Pg.375]    [Pg.375]    [Pg.377]    [Pg.379]    [Pg.381]    [Pg.383]    [Pg.385]    [Pg.387]    [Pg.389]    [Pg.391]    [Pg.393]   


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