Expression

The expression of genes involved in the inflammatory response is controlled both transcriptionally and post-transcriptionally.
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Gene expression in eukaryotes is controlled by a variety of mechanisms that range from those that prevent transcription to those that prevent expression after the protein has been produced.
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Stages of gene expression that are regulated
Any step of gene expression may be modulated, from the DNA-RNA transcription step to post-translational modification of a protein. Following is a list of stages where gene expression is regulated: ...
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Monitoring gene expression in yeast shows that different combinations of transcription factors participate in turning on (and off) entire sets of genes (reported by Holstege, F. C. P., et al, in Cell, 25 November 1998.
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The occurrence of gene expression in a tissue in which it is normally not expressed. Such ectopic expression can be caused by the juxtaposition of novel enhancer elements to a gene during genetic manipulation of transgenic organisms.
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Dr. Richard Morgan, of the National Human Genome Research Institute's Clinical Gene Therapy Branch, defines gene expression.
illustrated:
View illustration ...
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Expression cloning
One of the most basic techniques of molecular biology to study protein function is expression cloning.
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Expression Mapping: UWS; University of California, Los Angeles
For more information on the consortium,contact Leroy Hood (206/616-5014, Fax: /685-7301, tawny@washington.edu)
[Anne Adamson, HGMIS] ...
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Expression vector
A cloning vector designed so that a foreign gene inserted into the vector will be expressed in the host organism. The inserted DNA is often placed under the control of a strong, regulatable promoter (e.g.
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expression In relation to genes, the phenotypic manifestation of a trait. Expression may be age-dependent (e.g., Huntington disease) or affected by environmental factors (e.g., dark fur on Siamese cats).
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Expression of molecular genes
For various reasons, the relationship between DNA strand and a phenotype trait is not direct.
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EXPRESSION VECTOR - A plasmid or phage designed for production of a polypeptide from inserted foreign DNA under specific controls. Often an inducer is used.
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Expression clone: This is a clone (plasmid in a bacteria, or maybe a l phage in bacteria) which is designed to produce a protein from the DNA insert.
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expression vector
A vector that allows a DNA sequence cloned into it to be transcribed when the vector is introduced into a cell.
expressivity ...
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Expression clone: This is a clone (plasmid in a bacteria, or maybe a lambda phage in bacteria) which is designed to produce a protein from the DNA insert.
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: Expression of only one of the two homologous alleles at a locus in the case of heterozygosity.
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the expression of both of two different alleles in a heterozygote
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
What Topic Is Your BIOLOGY Paper On?
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This expression was introduced by Moses (1958) for the structure which he discovered in electron micrographs of paired chromosomes at the pachytene stage of meiosis.
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Gene expression: The process by which genes express themselves: in the cell, ge ne expression results in the manufacture of proteins that determine an organism's characteristics.
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Gene expression. The process of producing a protein from its DNA- and mRNA-coding sequences.
Gene flow. The exchange of genes between different but (usually) related populations.
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The overexpression or deletion of certain genes must also be evaluated from an animal welfare perspective. The secretion of proteins in the milk of transgenic goats seems to have no ill effects.
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phenotype The expression that results from an interaction of one or more gene pairs and the environment.
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phenotype: the expression of genes and the physical characteristics that result.
phloem: structures of vascular plants that transport sugars and other nutrients from the leaves to the other parts of the plant.
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Beak: Colloquial expression for the protruding mouthpart structures of a sucking insect (= proboscis).
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Expression library. (See Library.) F FDA. See Food and Drug Administration. Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). See Environmental Protection Agency. Federal Plant Pest Act (PPA). See U.S. Department of Agriculture.
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inducer A signal molecule that, when bound to a regulatory protein, produces an increase in the expression of a given gene. induction An increase in the expression of a gene in response to a change in the activity of a regulatory protein.
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Has also been used in expression studies. Yeast artificial chromosomes (YACs) are the most commonly used form.
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One of several regional or continental expressions of a given biome. Function: refers to action, how something works.
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In G inversion the orientation of Mu phage G segment determines tail fibre expression and thus host range (E.coli or Citrobacter). A similar variation in tail fiber expression is due to Cin in bacteriophage P.
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(Note that it's not yet clear how the expression of photopigments is regulated in individual cells, but because of its accessibility, the retina is frequently used in studies of developmental neuroanatomy.
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A technique to monitor gene expression in thousands of genes. Thousands of probe DNAs are spotted or synthesized on microscope slides. Sample RNAs are labeled with fluorescent dyes.
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enhancer - DNA sequence in a gene that influences the gene's expression by increasing or decreasing its rate of RNA synthesis (via effects on binding and transcription of the basal transcription apparatus including RNA Polymerase); ...
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Divergence in structure and function of cells as they become specialized during a multicellular organism's development; depends on the control of gene expression (cell differentiation).
Covered in Lab 14 Gametogenesis and Development ...
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fragments, antibodies, or proteins, by using a chip having immobilised target and hybridising them with probed sample. the color we get from the chip after hybridisation is then scanned and the data is analysed by a soft ware to find the expression ...
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Ethologists have been particularly concerned with the evolution of behavior and the understanding of behavior in terms of the theory of natural selection. In one sense the first modern ethologist was Charles Darwin, whose book The expression of the ...
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System Essays in Biochemistry vol 40: The Nuclear Receptor Superfamily Essays in Biochemistry vol 39: Programmed Cell Death Essays in Biochemistry vol 38: Proteases in Biology and Medicine Essays in Biochemistry vol 37: Regulation of Gene Expression ...
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Multifactorial -- a characteristic influenced in its expression by many factors, both genetic and environmental. Mutation -- process by which genes undergo a structural change.
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