dna

(redirected from DNA polymerase)
Also found in: Dictionary, Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to DNA polymerase: RNA polymerase, DNA replication

DNA

n. scientifically, deoxyribonucleic acid, a chromonal double chain (the famous "double helix") in the nucleus of each living cell the combination of which determines each individual's hereditary characteristics. In law, the importance is the discovery that each person's DNA is different and is found in each living cell, so a hair, blood, skin or any part of the body can be used to identify and distinguish an individual from all other people. DNA testing can result in proof of one's involvement or lack of involvement in a crime scene. While recent DNA tests have proved a convicted killer on death row did not commit a crime and resulted in his release, current debate concerns whether DNA evidence is scientifically certain enough to be admitted in trials. The trend is strongly in favor of admission.

dna

noun authentication, certification, confirmation of identity, proof of identity, scientific evidence, scientific means of designation, scientific means of identity, scientific means to distinguish a person, scientific method to reveal identity, substantiation, validation of identity, verification of identity, deoxyribonucleic acid
Associated concepts: appeal of a case, DNA fingerprint, DNA polymerase, forensics, overturning a case, reversal of a case

DNA

abbreviation for deoxyribonucleic acid, a chemical which is found in virtually every cell in the body and which carries genetic information. Except for identical twins, each person's DNA is unique. DNA profiling doesn't allow the examination of every single difference between people's DNA so the concentration will be on those aspects which are most likely to yield a difference. DNA can be extracted from any cells that contain a structure called the nucleus, for example, blood, semen, saliva or hair.

Mitochondrial DNA is inherited only from a person's mother. Brothers and sisters have the same mitochondrial DNA type as their mother. This feature of mitochondrial DNA can be used for body identification. The γ-chromosome is present only in men and is largely unchanged as it passes through the male line of a family. The usefulness of the technique in criminal matters is vastly enhanced by the extent to which it is possible to compare a sample with other individuals. To this end there is a National DNA Database maintained by the ASSOCIATION OF CHIEF POLICE OFFICERS and managed by the FORENSIC SCIENCE SERVICE. Techniques vary. There is a UK offence of DNA theft. It is also of assistance in paternity matters.

References in periodicals archive ?
Taq DNA polymerase is isolated from the thermophilic bacteria, Thermophilus aquaticus, and has a stable natural structure.
As an enzyme for PCR, we used the following types of DNA-dependent DNA polymerases: Taq DNA polymerase, Tersus DNA polymerase, Deep Vent DNA polymerase and Phusion DNA polymerase.
Stopped-flow DNA polymerase assay by continuous monitoring of dNTP incorporation by fluorescence.
It is reported that the Taq DNA polymerase lacks 3`-5` exonuclease activity and therefore, it is unable to cleave the mis-incorporated nucleotides [3].
Bacteria such as Escherichia coli are endowed with three specialised DNA polymerases.
The mixture was cooled atroom temperature and mixed with 1 mM dNTPs, 5-7 units of (Phi) 29 DNA polymerase and 0.
Phase is defined as the relative positions of the DNA polymerase molecules on 2 different DNA template strands and is affected by dispensation order.
Using Method 2, we developed a quantification method to determine the misincorporation rate of the natural bases at the Ds-Pa pair position, and assessed the selectivity (>99% per replication) of the Ds-Pa pairing in PCR using Vent DNA polymerase ([exo.
The difference in the nucleotides present in these clones was attributed to lack of proof reading of Taq DNA polymerase used for amplification.
Fidelity of DNA synthesis by the Thermus aquaticus DNA polymerase.
The obtained sequence of a fragment of the DNA polymerase gene ([approximately equal to] 550 bp) indicated that the viruses were a novel virus type within the genus Mastadenovirus and was tentatively named bat adenovirus 2 (bat AdV-2) strain P.

Full browser ?