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Expression in Biological Definition

Bioinformatics

... structure prediction , prediction of gene expression and protein-protein interactions , and the ... evolutionary biology 2.1 Gene expression analysis 2.2 Protein expression analysis 2.3 Structure prediction 2.4 ...

Bioinformatics

... structure prediction , prediction of gene expression and protein-protein interactions , and the ... evolutionary biology 2.1 Gene expression analysis 2.2 Protein expression analysis 2.3 Structure prediction 2.4 ...

Morphogenesis

... these secondary gene products can regulate the expression of still other genes in a regulatory cascade. ... around the periphery of the cell cytoplasm. Gene expression in these nuclei is regulated by the Bicoid, ... tailless and knirps are all gap genes . Their expression patterns in the early embryo are determined by ...

Gene

... 2.1 Chemical structure of a gene 2.2 expression of molecular genes 2.3 Mutations and evolution ... (more at genetics , allele ). expression of molecular genes For various reasons, the ... Just as there are many factors influencing the expression of a particular DNA strand, there are many ways ...

Molecular biology

... 2 Techniques of molecular biology 2.1 expression cloning 2.2 Polymerase chain reaction (PCR) ... enzymatic type of molecule in cells . expression cloning One of the most basic techniques of molecular biology to study protein function is expression cloning. In this technique, DNA coding for a ...

Morphogenesis

... these secondary gene products can regulate the expression of still other genes in a regulatory cascade. ... around the periphery of the cell cytoplasm. Gene expression in these nuclei is regulated by the Bicoid, ... tailless and knirps are all gap genes . Their expression patterns in the early embryo are determined by ...

Polymerase chain reaction

... of specific mutations 4.8 Comparison of gene expression 5 External links History ... the plasmid in organism B. (7) Multiplication or expression of the gene, originally from organism A, ... meiotic recombination. Comparison of gene expression Researchers have used traditional PCR as a way ...

Signal transduction

... stimulus can trigger via signal transduction the expression of entire suite of genes and a panoply of ... hormones are also called inductors of gene expression . The activation of gene transcription is much ... , cytoskeleton management, cell motion , gene expression and metabolism . The three main pathways that ...

Trait

... of traits in diploid organisms 4 Mendelian expression of genes in diploid organisms 5 Biochemistry of dominance and extensions to expression of traits Definition of a trait A ... the same genes at the same loci . Mendelian expression of genes in diploid organisms A gene is only a ...

Apoptosis

... factor nuclear factor kappa B (NF-κB), which induces the expression of genes that play an important role in diverse biological processes, ... of this gene, CED-9, protects cells from programmed cell death, so its expression (or lack of) conveys a life-or-death decision on individual cells. As part ...

Barr body

... roles of Xist and Tsix appear to be antagonistic. The loss of Tsix expression on the future inactive X chromosome results in an increase in levels of ... via the methylation of CpG sites . These changes help inactivate gene expression on the inactive X-chromosome and to bring about its compaction to form the ...

Charles Darwin

... Descent of Man and Selection in Relation to Sex and followed up by The expression of Emotions in Animals and Man . Darwin produced practical explanations ... The Descent of Man and Selection in Relation to Sex 1872 – The expression of Emotions in Man and Animals 1875 – Movement and Habits of ...

Chromatin

... to constrain the size of the molecule and to allow the cell to control expression of the chromatin packaged genes. Changes in chromatin structure are ... to constrain the size of the molecule and to allow the cell to control expression of the chromatin packaged genes. Changes in chromatin structure are ...

Genetic code

... code. Contents showTocToggle("show","hide") 1 Genome expression 2 Table 1: RNA Codon table 3 Table 2: Reverse codon table 4 ... the genetic code 6 References 7 External links Genome expression The genetic information carried by an organism - its genome - is ...

Genetic code

... code. Contents showTocToggle("show","hide") 1 Genome expression 2 Table 1: RNA Codon table 3 Table 2: Reverse codon table 4 ... the genetic code 6 References 7 External links Genome expression The genetic information carried by an organism - its genome - is ...

Human

... Many humanists are religious, however, and see humanism as simply a mature expression of a common truth present in most religions. Humanists affirm the ... may be immaterial, is known as dualism , and was given its most powerful expression by the French philosopher Ren Descartes (1596-1650), who argued that, ...

Proteomics

... and the environment. One organism will have radically different protein expression in different parts of its body, in different stages of its life cycle and ... implies that protein diversity cannot be fully characterized by gene expression analysis alone, making proteomics a useful tool for characterizing cells ...

Reverse genetics

... of gene knockdown using Morpholino oligos have made disrupting gene expression an accessable technique for many more investigators. So phenotype, rather ... In C. elegans , RNAi has been used to systematically interfere with the expression of most genes in the genome. While RNA interference relies on systems ...

Biology

... 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 emotions in animals and men influenced many ethologists. History of the word "biology" Formed by combining the Greek ...

Biotechnology

... See also Biochemistry Bioreactor Biorobotics EU Directive on the patentability of biotechnological inventions expression vector Genetic engineering genetically modified food Industrial biotechnology intein List of publications in ...

Brain

... measurements of brain function and may not be practical in all animals. Post-mortem analyses of brains allow for the study of anatomy and protein expression patterns but can only be done after the human or animal is dead. Myths The following are some common myths or misconceptions about the mind ...

Culture

... and unnatural developments which obscure and distort people's essential nature. On this account, folk music by working-class people is an honest expression of a natural way of life, and classical music is superficial and decadent. Equally, non-Western people are often seen as 'noble savages' living ...

Down syndrome

... of chromosome 21). Depending on the actual etiology , the learning disability may range from mild to severe. Trisomy 21 results in over- expression of genes located on chromosome 21. One of these is the superoxide dismutase gene. Some (but not all) studies have shown that the activity of the ...

Electrical energy

... electrical energy of a charge Q situated at the electric potential V equals to the product QV . If V is a potential difference , the same expression gives the energy transformed when the charge moves through the potential difference. Electrical energy is also identical to the electromagnetic ...

Evolutionary developmental biology

... of transcriptional regulation allows a rich substrate for morphological diversity, since variations in the level, pattern, or timing of gene expression , may provide more variation for natural selection to act upon, than changes in the gene product alone. References Sean B. Carroll, 2000 , ...

Expressed sequence tag

... to approximately 500 to 800 nucleotides . ESTs are also a useful resource for designing probes for DNA microarrays used to determine gene expression . External links The NCBI Handbook, Part 3, Chapter 21 has a very nice overview. ...

Gene regulatory network

... Genes can be viewed as nodes in a network , with input being proteins such as transcription factors , and outputs being the level of gene expression . The node itself can also be viewed as a function which can be obtained by combining basic functions upon the inputs (in the Boolean network ...

Genomics

... are in the food and agriculture sectors. The major tools and methods related to genomics are bioinformatics , genetic analysis, measurement of gene expression , and determination of gene function. Contents showTocToggle("show","hide") 1 History 1.1 The growth of the "omics" 2 ...

Gradient

... nabla ) is the vector differential operator del , and φ is a scalar function. It is sometimes also written grad(φ). In 3 dimensions, the expression expands to in Cartesian coordinates . ( See partial derivative and vector . ) Example For example, the gradient of the function ...

Growth curve

... has been depleted. Analysis of the molecular basis for this bi-phasic growth curve led to the discovery of the basic mechanisms that control gene expression . Cancer cell growth Cancer research is an area of biology where growth curve analysis [1] plays an important role. In many types of ...

Hardy-Weinberg principle

... homozygote to be p 2 , the Aa heterozygote to be 2 pq and the other aa homozygote to be q 2 . The Hardy–Weinberg principle is an expression of the notion of a population in "genetic equilibrium" and is a basic principle of population genetics . Contents ...

Insulin

... in the cells causes release of previously synthetised insulin, which has been stored in secretory vesicles The calcium level also regulates expression of the insulin gene via the calcium responsive element binding protein ( CREB ). This is the main mechanism for release of insulin and ...

Isozyme

... . However, if the mutations do not immediately prevent the enzyme from functioning, but instead modify either its function, or its pattern of gene expression , then the two variants may both be favoured by natural selection and become specialised to different functions. For example, they may be expressed ...

Long-term potentiation

... 94 (9), 4761-5. PMID 9114065 ^ Malinow R, Schulman H, Tsien RW (1989) "Inhibition of postsynaptic PKC or CaMKII blocks induction but not expression of LTP". Science 245 (4920), 862-6. PMID 2549638 ^ Otmakhova NA, Otmakhov N, Mortenson LH, Lisman JE (2000) "Inhibition of the cAMP ...

Lyon hypothesis

... system Dosage compensation Reference Carrel L, Willard HF. X-inactivation profile reveals extensive variability in X-linked gene expression in females. . Nature 2005;434:400-404. PMID 15772666 . Lyon MF. Gene action in the X chromosome of the mouse (Mus musculus L). Nature ...

Molecular genetics

... reverse genetics screens RNA interference gene knockout transgenics and overexpression mapping, cloning, and sequencing gene expression measuring spatial and temporal regulation cDNAs imprinting bacterial and phage molecular genetics eukaryotic molecular genetics ...

Oncogene

... a dividing stem cell in the bone marrow leads to adult leukemia An increase in protein concentration, caused by an increase of protein expression (through misregulation) an increase of protein stability, prolonging its existence and thus its activity in the cell a gene duplication , ...

Osmosis

... the solvent. For the case of very low solute concentrations, -ln(1- x 2 ) ≈ x 2 and Equation 2 can be rearranged into the following expression for osmotic pressure: Reverse osmosis The osmosis process can be driven in reverse with solvent moving from a region of high solute ...

RNA

... RNA molecule is the primary transcript . Modulation of the rate of initiation of RNA synthesis is one of the most important ways in which gene expression is regulated. RNA world hypothesis The RNA world hypothesis proposes that the universal ancestor to all life relied on RNA both to carry ...

Rudolf Steiner

... not grounded in the world independent of human cognition, this participatory conception held that these subjective principles are in fact an expression of the world's own being, and that the human mind is ultimately the organ of the world's own process of self-revelation. In this view, the essential ...
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