Expression quantitative trait loci (eQTLs) are genomic loci that regulate gene transcription and expression on a genome-wide scale. Some eQTLs are active in all tissue types (known as static eQTLs) while others are tissue-dependent (dynamic).
Gene Expression
Gene expression is the process by which the information encoded in a gene is used to direct the assembly of a protein molecule. The cell reads the sequence of the gene in groups of three bases.
The expression of genes involved in the inflammatory response is controlled both transcriptionally and post-transcriptionally.
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.
Gene Expression.
When genes are expressed, the genetic information (base sequence) on DNA is first transcribed (copied) to a molecule of messenger RNA in a process similar to DNA replication.
In nature, green fluorescent protein (GFP) is produced by, Aequorea victoria, the Pacific Northwest jellyfish. The protein has become of great interest to cell and molecular biologists because it can reveal gene expression in living cells.
Eukaryotic Gene Expression Problem Set
Instructions: The following problems have multiple choice answers. Correct answers are reinforced with a brief explanation. Incorrect answers are linked to tutorials to help solve the problem.
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.
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).
expression vector
A vector that allows a DNA sequence cloned into it to be transcribed when the vector is introduced into a cell.
expressivity ...
Expression library. (See Library.)
F
FDA. See Food and Drug Administration.
Gene expression analysis
The expression of many genes can be determined by measuring mRNA levels with multiple techniques including microarrays, expressed cDNA sequence tag (EST) sequencing, ...
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.
over expression A DNA construct in which a gene is fused to a promoter conferring a constitutive and or high level of expression.
P1 A plasmid vector derived from Bacteriophage P1 used to clone DNA fragments between 70-95 kb in length.
Expression (← links)
Rev (← links)
Mrna (← links)
Expression gene (← links)
Provirus (← links)
Proviruses (← links)
Genome (← links)
Chromosome (← links)
Chromosomes (← links)
Minus-strand nucleic acid (← links) ...
Expression
- The physical manifestation of the information contained in a gene.
EXPRESSION VECTOR - A plasmid or phage designed for production of a polypeptide from inserted foreign DNA under specific controls. Often an inducer is used.
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.
The expression of A genes induces the development of sepals.
The expression of B genes together with A genes induces the development of petals.
The expression of B genes together with C genes induces the development of stamens.
the expression of both of two different alleles in a heterozygote
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
...
Overexpression / Ectopic expression
overexpression of Smo is not sufficient to activate the pathway, casting doubt on the proposed stoichiometric relationship between Ptc and Smo (Alcedo. 2000; Denef, 2000; Ingham, 2000).
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.
1. Phenotypic expression more common in males
2. Sons cannot inherit the trait from their fathers, but daughters can.
Sons inherit their Y chromosome from their father.
phenotype The expression that results from an interaction of one or more gene pairs and the environment.
Central dogma of molecular biology: DNA is transcribed into RNA and RNA is translated into protein only in this direction. This concept is first proposed by Francis Crick in 1957. For more, see Gene Expression.
One of several regional or continental expressions of a given biome. Function: refers to action, how something works.
Penetrance An "ll or none" reference to clinical expression of a mutant gene.
Phage A virus for which the natural host is a bacterial cell.
Physical map A map of the locations of identifiable landmarks on DNA (e.g.
Has also been used in expression studies. Yeast artificial chromosomes (YACs) are the most commonly used form.
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.
(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.
Coordination of gene expression, protein synthesis, and post-translational events
Interaction of proteins in complex molecular machines
Predicted vs experimentally determined gene function
Evolutionary conservation among organisms ...
Chromatid interference is the expression which Mather (1933) introduced for a non-random distribution between the chromatids involved in successive cross-overs.
Related Terms:
Crossing over ...
Its angular head acts as a dilator of the naris; the infraorbital and zygomatic heads assist in forming the nasolabial furrow, which passes from the side of the nose to the upper lip and gives to the face an expression of sadness.
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.
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); ...
Folate, a vitamin, is an environmental agent which can affect the expression of the genes for NTDs.
Combinatorial control A means of controlling gene expression in eukaryotes in which each transcription factor, rather than acting on its own to effect transcription, ...
Expressivity The degree of expression of a mutant phenotype. If there is a variable expressivity it may range from mild symptoms to a severe phenotype. See also penetrance.
Beak: Colloquial expression for the protruding mouthpart structures of a sucking insect (= proboscis).
A second meaning refers to cloning DNA, or the act of creating copies of an individual gene, for expression in a foreign host, which leads to generation of exact replica macromolecules (e.g. DNA, RNA, proteins).
4. How do Buffers Work?
Nuclear reprogramming: Restoration of the correct embryonic pattern of gene expression in a nucleus derived from a somatic cell and introduced into an oocyte.
A variety of techniques that molecular biologists use to manipulate DNA molecules to study the expression of a gene. [Talking Glossary]
Recombination ...
It depends on the Biotic Field, specifically, on the amount of energy assigned for the space where the interaction of charged particles happens - promoted by photons- to generate the Proton Motile Force, which is the physical expression, ...
differentiation
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).
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 ...
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 ...
Multifactorial -- a characteristic influenced in its expression by many factors, both genetic and environmental. Mutation -- process by which genes undergo a structural change.
 See also: Express, Gene, Protein, DNA, Trans
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