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Negative in Biological Dictionary

Phosphate ion

... The phosphate ion carries a negative three formal charge and is the conjugate ... In ... acid. ... The phosphate ion carries a negative three formal charge and is the conjugate ... ... acid. ... The phosphate ion carries a negative three formal charge and is the conjugate ... ...

Negative interference

... 1 Positive and negative transfer. 2 Conscious and unconscious transfer ... often discussed as a source of errors known as negative transfer. ... The concept of negative liberty refers to freedom from interference by ...

Positive interference

... 1 Positive and negative transfer. 2 Conscious and unconscious transfer ... Similar interference ... greater when the v1–e distance is small—this trend can ... Positive and negative interference are well documented aspects of the cross ... ... was ...

Homeostasis

... - covers genetics, cells, biochemistry, enzymes, ... Homeostasis and negative Feedback cartoon ... The principle of negative feedback control in physiological homeostasis . ... Homeostasis has ...

Gravitropism

... . 3. Apical dominance. 4. Fruit development ... Plant shoots display negative gravitropism : when placed on its side, a plant shoot will grow up ... ... plant ... growth process, called gravitropism , dictates upward ... negative gravitropism (Kuznetsov and Hasenstein, 1997) ... although several ...

Feedback inhibition

... This type of negative feedback slows flux through a pathway when the products ... 1.2 Quantitative description of reversible inhibition ... negative feedback occurs when the output of a system acts to oppose changes to ...

DNA gyrase

... is highly homologous to its well-studied Escherichia ... efficient in negative supercoiling as the E. coli DNA gyrase . ... DNA gyrase is a ... of gyrase and topoisomerase IV on DNA probably ... gyrase removes negative supercoils from DNA (47, 189). Since ... DNA gyrase is a ...

Z-DNA

... left-handed form of the DNA double helix, Massachusetts Institute of ... DNA, dubbed Z-DNA by the ... Z-DNA is stabilized in vivo by negative supercoiling of DNA, which occurs ... The Z-DNA conformation, favored by alternating purines and pyrimidines, is ... Z-DNA , a long-known but ...

Ubiquitin

... is then transferred to an E2 cysteine. ... anaphase-promoting complex-dependent proteasomal ubiquitin -dependent protein catabolic process ... negative regulation of ubiquitin -protein ligase activity ... The diverse roles of ubiquitin and the 26S proteasome in the life of plants. ... ...

Tropism

... to an environmental stimulus. In tropisms, this response is dependent on the direction of the stimulus . Viruses and other pathogens ... ... negative gravitropism, bending (biologists say, turning; see tropism ) upwards. ... A " tropism " is a plant movement triggered by stimuli. ....

Telomere

... of diabetic nephropathy in patients with type 1 diabetes. ... Telomere dysfunction provokes regional amplification and deletion ... negative regulator of telomere length (telomerase-dependent pathway) ... Tankyrase-mediated ADP-ribosylation of TRF1 inhibits binding to telomere repeats ...

Superficial

... general term meaning "regarding the surface", often metaphorically. Both in the literal as in the metaphorical sense the term has often a negative connotation based on the idea that deeper parts are also important to consider. The superficial palmar arch is formed predominantly by the ulnar ...

Stigma

... ... Mental health â€" Understand and overcome the stigma of mental illness and mental health disorders. ... Based on stereotypes, stigma is a negative judgment ... AIDS-related stigma refers to a pattern of prejudice, discounting, discrediting, and discrimination directed at people perceived to ...

Spirochetes

... Online Textbook of Bacteriology chapter on Lyme disease and the spirochete Borrelia burgdorferi. ... Print this Page ... Spirochetes are Gram negative bacteria that are long, thin, helical and motile. ... It is extremely difficult to detect spirochetes in tertiary syphilis. ... largest in ...

Selection

... Selection at Dictionary.com a free online dictionary ... or a number of things selected . 3. ... selection se·lec·tion (sĭ-lěk'shən) n. ... negative selection is an unavoidable consequence of evolution. ... Selection is a powerful force in evolution, and it works in many ways. ... A ...

Resting potential

... is highly conductive, while a cell's plasma membrane is highly resistive, the ... In most cells the resting potential has a negative value, which by convention ... The resting potential is mostly determined by the concentrations of the ions in ... The Resting Potential . ...

Repressor

... It is active in the absence of lactose, ensuring that the bacterium ... The lac operon and its repressor illustrate the effects of negative regulation ... When the lac repressor protein is bound to the promotor on the lacZYA operator, ... Definition of repressor from the ...

RecA protein

... protein and lambda repressor. ... What buffer should be used with RecA Protein ? ... The Escherichia coli RdgC protein is a potential negative regula- tor of RecA function. RdgC inhibits RecA protein -promoted DNA ... In this case the mutant RecA protein is unable to bypass the ...

Polarity

... Chemical polarity , a concept in chemistry which describes how equally bonding ... Grammatical polarity , the distinction of affirmative and negative ... In chemistry, polarity refers to a separation of electric charge leading to a molecule having an electric dipole. Polar molecules can bond ...

Plasma

... ionized gas, in which a certain proportion of electrons are free rather than being bound to an atom or molecule. The ability of the positive and negative charges to ... Plasma effect, a computer-based animated visual effect, used in graphics demonstrations ... Plasma cannon, further ...

Phototropism

... and more. ... Search " Phototropism " ... This page gives an introduction to phototropism (a plant's response to light) ... Positive and negative phototropism within the same tissue are characteristic not ... Phototropism is a plant's response to light. Learn more! ... There are two ...

Operon

... terminator, and an ... The lac operon . ... the genes in these operons appear — as in bacteria ... So the lac operon is under both negative (the repressor) and positive (CAP) control. ... Encyclopedia article about Operon . Information about Operon in the Columbia ... A typical ...

MutS

... with von ... hMSH5: a human MutS homologue that forms a novel heterodimer ... Multicopy plasmids carrying mutS alleles that are dominant negative for MMR were ... MutS , on the other hand, binds to most mismatched base pairs, with highest ... Complete information for MSH5 gene ...

Lac repressor

... Repressor Protein. In the absence of lactose, the Lac repressor ... The effect of the Lac repressor on the lac genes is referred to as negative regulation. ... The lac repressor binds to a specific sequence of two dozen nucleotides ... The lac repressor represents only a tiny ...

Hyperpolarization

... Assorted References function in nervous systems ( in nervous system (anatomy): The neuronal membrane ) ... the plasma membrane has a negative charge compared to the outside, the neuron is said to be polarized. Any change in membrane potential tending to make ... Psychology research, ...

Hydroxyl radical

... you asked for in hydroxyl radical ... Hydroxyl Radical Air PurifierSharp ... Article on hydroxyls and air purification. How negative hydroxyl ions purify the air outdoors. We can use this method to ... a second hydroxyl radical and an ... A novel fluorometricmethod has ...

Heterozygous

... The other parents and their unaffected son were heterozygous for the same mutation. ... both likely to be sporadic, heterozygous , dominant negative mutations. ... Mice heterozygous for a mutation at the Nf2 tumor suppressor locus develop a ... Nf2 heterozygous mice were mated to ...

Heterotroph

... Its free and an e-mail isn't required. Heterotroph . From The Aquarium Wiki ... Heterotroph bacteria can be either gram positive or the gram negative type. ... Information about heterotroph in the free online English ... heterotroph - an organism that depends on complex organic substances ...

Helix-loop-helix

... mRNA ... Buy quality rabbit ID4 antibody (interacts with human mouse rat dog), anti-ID4, ID4 (inhibitor of DNA binding 4. dominant negative helix - loop - helix protein) ... The basic helix - loop - helix (bHLH) proteins form a large superfamily of ... The short α- helix region ...

Gyrase

... in the code for DNA gyrase . ... ... the mutations are in the gyrase structural genes or in nearby regulatory ... DNA gyrase introduces negative supercoiling into circular DNA by catalyzing the ... By representing the gyrase inhibition as a true pleiotropic phenomenon, we were ... These ...

Genetic drift

... may occur over a short time scale among the cells in a single ... A focus on genetic drift as the essence of species provides a form of negative ... Challenging the scientific, sometimes even controversial conclusions is not a new thing. ... The official definition of genetic drift says ...

Exergonic reaction

... reactions are those in which the free ... Exergonic reactions ... In an exergonic reaction the change is free energy is represented by a negative ... ... rate of exergonic reactions by lowering the activation energy of the reaction . Exergonic reactions are those in which the free ...

Eugenics

... of eugenics was taken up by a variety of groups in the United States ... 1 Historical Eugenics . 1.1 American scientists and Nazi Germany ... negative eugenics ' utilized marriage restriction, sterilization, or custodial ... Positive eugenics ' tried to encourage the population perceived as the ...

Eubacteria

... Eubacteria . ... Organisms that lack a nucleus or other membrane-bounded organelles. ... EUBACTERIA ... Gram positive Eubacteria ... Gram negative Eubacteria . About 75% of known eubacteria are gram negative. ... Gram positive Eubacteria ... 2. http://www.museums.org.za /bio/ eubacteria ......

Escherichia coli

... Escherichia coli , is a Gram negative bacterium that is commonly found in the lower intestine of warm-blooded organisms (endotherms). Most E. coli strains are harmless, but some, such ...

Endergonic reaction

... change in free energy is positive, and energy is absorbed. In layman's terms the total amount of energy is a loss so the total energy is a negative net result. For an ... Endergonic means absorbing energy in the form of work. Its etymology stems from the suffix -ergonic, as derived ...

Elongation factor

... elongation factor . Synonyms ... with its role as an accessory factor for transcription elongation (Adelman, 2005) ... Depletion of one negative elongation factor E (NELF) subunit in salivary glands ... found in a complex with another positive elongation factor called Tat-SF1. ... ...

Double stranded

... double - stranded structure of DNA provides a simple mechanism for DNA replication. ... Double - stranded RNA Viruses. Single- stranded negative Sense ... Double - stranded RNA Viruses. Click on an image to view larger version & data in a new window ... Double - strand rappels give ...

Dimer

... diseases and conditions The d-Dimer test, which is used to rule out blood clots, is explained in this ClotCare posting. ... If you have a negative (normal) d-Dimer result, that nearly ... D-dimer D-dimer is a fibrin degradation product , a small protein fragment ... Why does benzoic acid ...

Copy number control

... plasmids. ... The copy - number control of plasmids operates by either limiting the supply of ... Origin pairing ('handcuffing') as a mode of negative control of P1 plasmid copy number ... control provides a mechanism to adjust fluctuations in copy numbers . ... Copy Control is ...
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