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DNA in Biological Dictionary

DNA

Deoxyribonucleic acid ( DNA ) is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms and some viruses. The main role of DNA molecules is the long-term... Z- DNA is one of the many possible double helical structures of ...

Satellite DNA

Satellite DNA consists of highly repetitive DNA , and is so called because repetitions of a short DNA sequence tend to produce a different frequency of the nucleotides adenine, cytosine, guanine and thymine, and thus have a different density from bulk DNA - such that... satellite DNA...

Repetitive DNA

... ( DNA ) From Wikipedia, the free encyclopedia (Redirected from Repetitive DNA ) Jump ... Satellite DNA · Variable number tandem repeat/Minisatellite · Short tandem ... Interspersed repetitive DNA is found in all eukaryotic genomes. These sequences propagate themselves by RNA...

Relaxed DNA

In a " relaxed " double-helical segment of DNA , the two strands twist around the helical axis once every 10.4-10.5 base pairs of sequence. Adding or subtracting twists, as some enzymes can do, imposes strain. If a DNA segment... ... twisting it about the other strand, to re...

Recombinant DNA

Recombinant DNA is a form of DNA that does not exist naturally, which is created by combining DNA sequences that would not normally occur together. In terms of genetic modification, recombinant DNA (rDNA) is introduced... recombinant DNA n. Genetically engineered DNA prepared by tr...

Mitochondrial DNA

Mitochondrial DNA (mtDNA) is the DNA located in organelles called mitochondria. Most other DNA present in eukaryotic organisms is found in the cell nucleus. Mitochondrial DNA was discovered by Margit M. K. Nass and Sylvan... Human mitochondrial genetics is the study of the genetic...

Intergenic DNA

An Intergenic region is a stretch of DNA sequences located between clusters of genes that contain few or no genes. Occasionally some intergenic DNA acts to control genes close by, but most of it has no currently known function. It is one of the DNA sequences collectively referred to as junk...

Heteroduplex Dna

A heteroduplex is a double-stranded (duplex) molecule of nucleic acid originated through the genetic recombination of single complementary strands derived from different sources, such as from different homologous chromosomes or even from different organisms. One such example is the heter...

Genomic DNA

In classical genetics, the genome of a diploid organism including eukarya refers to a full set of chromosomes or genes in a gamete; thereby, a regular somatic cell contains two full sets of genomes. In haploid organisms,... In molecular biology, a library is a collection of DNA f...

Exogenous DNA

Exogenous DNA refers to any deoxyribonucleic acid that originates outside of the organism of concern or study. Exogenous (or exogeneous) refers to an action or object coming from outside a system. It is the opposite of endogenous, something generated from within the system. Exogenous...

Complementary DNA

In genetics, complementary DNA (cDNA) is DNA synthesized from a mature mRNA template in a reaction catalyzed by the enzyme reverse transcriptase. cDNA is often used to clone eukaryotic genes in prokaryotes. When scientists... Deoxyribonucleic acid ( DNA ) is a nucleic acid that conta...

Chloroplast DNA

The chloroplast has its own DNA which codes for redox proteins involved in ... Direct measurement of the transfer rate of chloroplast DNA into the nucleus" ... Discusses the evolution of mitochondria and chloroplasts in eukaryotes. ... There are no histones associa...

Z-DNA

... Z - dna is one of the many possible double helical structures of dna . It is a left-handed double helical structure in ...lix winds to the left in a zig-zag pattern . Z - dna is thought to be one of three... left-handed ...

Zinc finger

...inger domains can be engineered to target desired dna sequences which enables zinc - finger nucleases ...olypeptide to make a ... What sequence in which dna chain is contacted by zinc finger 3? answer .....ors GATA-4, -5, and -6 - J. Biol. Chem. ... ... dna to RNA: a finger -shaped fold of amino acids pl...

Y chromosome

...hromosome lies between the pseudoautosomal ... dna Genealogy: Extend your concept of family through dna testing. ... What Is Y-DNA ( Y chromosome DNA)?...68: 1141. ... Y chromosome . Human Y-chromosome dna haplogroups. Single-origin hypothesis ... But...

Xeroderma pigmentosum

...roderma pigmentosa, or XP, is an autosomal recessive genetic disorder of dna repair in which the ability to repair damage caused by ultraviolet (UV) lig...roderma pigmentosa, or XP, is an autosomal recessive genetic disorder of dna repair in which the ability to repair damage caused by ultraviolet (UV) lig...

Xenobiology

...opsychology or Exopsychology is the field of study concerned ... field of space science known as Astrobiology or Exobiology (see Xenobiology ) ... dna Proves Groovy Hopping Fish Known As "Psychedelica" Is A New Species The Only Alien ... 1-2 of 2 for " xenobiology " San Francisco, 2:07 PM. Tue Jul 28...

VNTR

...TR alleles are hypervariable regions of human dna that differ from each other in: ... VNTR stands ...eles may exist, each with ... If the fragments of dna containing the VNTR alleles are to be separate... By using buoyant density gradient centrifugation, dna fragments with ... One type of minisatellites is c...

Virion

...ing to a ... virion n. A complete viral particle, consisting of RNA or dna surrounded by a protein shell and constituting the infective form of a ... ... Definition of Virion . Virion : A complete virus particle with its dna or RNA core and ... Next to the common cold, influenza (the flu) is perh...

Venter

... with audio pronunciations, thesaurus, Word of the Day, and word games. Watch Venter videos from all over the internet ... Riz Khan -Human Genome dna Venter - 10 Sept 07 ... Craig Venter on the Sorcerer II Expedition ... Information about venter in the free online English dictionary and enc...

UvrA

...th UvrB and forms a trimer which is able to detect dna ... ... acid sequence homology with the E. ...rotein on its own binds preferentially to damaged dna (Seeberg and ... Incubation of substrate G1 with...e UvrA (2)B complex allows dynamic recognition of dna damage. 18 ... Dimerization of Escherichia coli U...

Uracil

...five main nucleobases found in the nucleic acids dna and RNA. ... Uracil (U), thymine (T), and cyt... adenosine through ... Substituted uracil in dna ... of the oxidized cytosine derivative, 5-hydro...racil perform important functions ... uracil dna N-glycosylase activity. • protein binding ... St...

Untranslated RNA

...l "blueprint" for a protein product. mRNA is transcribed from a dna template, and carries coding information to the sites of protein synthesi...after splicing and polyadenylation it is ... Untranslated regions ... dna strand that the RNA was transcribed from. ... ...

Untranslated region

... The five prime untranslated region (5' UTR), also known as the leader sequence, is a particular section of messenger RNA (mRNA) and the dna that codes for it. It starts at the +1 position and ends just before the start codon (usually AUG) of the coding region . It... The three prime ...

Triplet repeat expansion

...iplet expansion is caused by slippage during dna replication. ... Aspects of the topic triplet ...ed PCR (tpPCR) using frequently ... The Role of dna Instability in Triplet Repeat Expansion During in vitro dna Replication ......

Transposon mapping

...r generating transposon maps that are used for dna sequencing. ... Chromosome Mapping . dna Transposable Elements. Software ... ... to a 46...r generating transposon maps that are used for dna sequencing. ... that finds the most robust map w...

Transposition

... Transposons are sequences of dna that can move around to different positions within the genome of a single...osition . In the process, they can cause mutations and change the amount of dna in the... Transposition (mathematics), a permutation which exchan...

Transposon

... A dna composite transposon . Transposons are sequences of dna that can move around to ... The most common form o...Transposon " ... transposon n. A segment of dna that is capable of independently replicating itsel...

Transposase

... acids and ... is organized as a hexamer, a very unusual arrangement for a dna transposase . ... TnsABC* Transposase is used in the GPS&trade; series of systems (<a href ... λ dna and 4 µl of TnsABC* Transposase in 1X GPS Buffer supplemented with 15 mM ...

Transposable element

...osable Genetic Elements . A. There are three types of transposable ... Transposable elements in eukaryotes are of two types: those that have dna as ... Definition of transposable element from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and...

Transient transfection

...s the process of introducing nucleic acids into cells by non-viral methods. The term "transformation" is preferred to describe non-viral dna transfer in bacteria and non-animal eukaryotic cells; "transduction" is often used to describe virus-mediated DNA... Encyclopedia infor...

Transgenic mouse

..... lab developed transgenic mice in which ... Creating a transgenic mouse requires several critical steps. ... The TMS will microinject BAC dna to create the desired transgenic mice . ... ... with proven tissue specific expression in transgenic mice where possible. ... must be re...

Transgenic plant

...ene or genes that have been transferred from a different species. Although dna of another species can be integrated in a plant genome by natural proce...c plants and crop improvement. 6 Plant transformation with foreign dna ... Transgenic Plants -- Biotechnology Stocks ... Transgenic plant...

Transgenic animal

...ransgenic animal ? An animal is " transgenic " once a scientist inserts dna from another organism. ... Are any transgenic animals on the food marke... Review Article ... An animal is " transgenic " once a scientist inserts dna from another organism. ... ...

Transgenic

... Transgenic plants possess a gene or genes that have been transferred from a different species. Although dna of another species can be integrated in a plant genome by natural processes, the term " transgenic plants" refers to... A genetica...

Transfection

...ods. The term "transformation" is preferred to describe non-viral dna transfer in bacteria and non-animal eukaryotic cells; "transduction&...poration) ... Transfection reagents are highly efficient for plasmid dna and siRNA ... Transfection is the transient or stable introduction of exo...

Transfer RNA

...fer RNA often is small, only about 74-79 nucleotides. ... Transfer RNA has primary structure, secondary ... A summary of Transfer RNA in dna Translation. ... That component is transfer RNA (tRNA), which acts as a kind of link between the ... The answer: by means of transfer RNA m...

Transduction

... Transduction is the process by which dna is transferred from one bacterium to another by a virus. It also refers to the process whereby foreign dna is introduced into another cell via a viral vector. This is a common tool...

Transcription unit

...n of DNA. RNA synthesis, or transcription , is the process of transcribing dna nucleotide sequence information into RNA sequence information. Both ...ation ... transcription n. The act or process of transcribing . ... A dna transcription unit that is translated into protein contains sequences...

Transcriptome

...e is different from a genome, which is the entire dna sequence ... A transcriptome represents the ve...NS transcriptome platform is intended to produce dna microarrays and to offer for scientific community use facilities to make the most of these dna micorarrays. Transcriptome analyses: experime...
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