plasmid DNA - meaning and definition. What is plasmid DNA
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What (who) is plasmid DNA - definition

Binary vectors; User:Jrobi8/sandbox; TDNA Binary System; Binary plasmid; Helper plasmid; T-DNA binary system; T-DNA Binary system

Plasmid         
  • Overview of bacterial conjugation
  • [[Electron micrograph]] of a DNA fiber bundle, presumably of a single bacterial chromosome loop
  • Electron micrograph of a bacterial DNA plasmid (chromosome fragment)
  • There are two types of plasmid integration into a host bacteria: Non-integrating plasmids replicate as with the top instance, whereas [[episomes]], the lower example, can integrate into the host [[chromosome]].
SMALL DNA MOLECULE WITHIN A CELL THAT IS PHYSICALLY SEPARATED FROM A CHROMOSOMAL DNA AND CAN REPLICATE INDEPENDENTLY
Plasmids; Minipreparation; Minprep; PDNA; F plus cell; F-pili; F-duction; Multicopy plasmid; Plasmide; Plasmid vector; Theta-type plasmid; Theta type plasmid; Col plasmid; Megaplasmid; DNA plasmids; Linear plasmid
·noun A piece of DNA, usually circular, functioning as part of the genetic material of a cell, not integrated with the chromosome and replicating independently of the chromosome, but transferred, like the chromosome, to subsequent generations. In bacteria, plasmids often carry the genes for antibiotic resistance; they are exploited in genetic engineering as the vehicles for introduction of extraneous DNA into cells, to alter the genetic makeup of the cell. The cells thus altered may produce desirable proteins which are extracted and used; in the case of genetically altered plant cells, the altered cells may grow into complete plants with changed properties, as for example, increased resistance to disease.
Plasmid         
  • Overview of bacterial conjugation
  • [[Electron micrograph]] of a DNA fiber bundle, presumably of a single bacterial chromosome loop
  • Electron micrograph of a bacterial DNA plasmid (chromosome fragment)
  • There are two types of plasmid integration into a host bacteria: Non-integrating plasmids replicate as with the top instance, whereas [[episomes]], the lower example, can integrate into the host [[chromosome]].
SMALL DNA MOLECULE WITHIN A CELL THAT IS PHYSICALLY SEPARATED FROM A CHROMOSOMAL DNA AND CAN REPLICATE INDEPENDENTLY
Plasmids; Minipreparation; Minprep; PDNA; F plus cell; F-pili; F-duction; Multicopy plasmid; Plasmide; Plasmid vector; Theta-type plasmid; Theta type plasmid; Col plasmid; Megaplasmid; DNA plasmids; Linear plasmid
A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal DNA and can replicate independently. They are most commonly found as small circular, double-stranded DNA molecules in bacteria; however, plasmids are sometimes present in archaea and eukaryotic organisms.
plasmid         
  • Overview of bacterial conjugation
  • [[Electron micrograph]] of a DNA fiber bundle, presumably of a single bacterial chromosome loop
  • Electron micrograph of a bacterial DNA plasmid (chromosome fragment)
  • There are two types of plasmid integration into a host bacteria: Non-integrating plasmids replicate as with the top instance, whereas [[episomes]], the lower example, can integrate into the host [[chromosome]].
SMALL DNA MOLECULE WITHIN A CELL THAT IS PHYSICALLY SEPARATED FROM A CHROMOSOMAL DNA AND CAN REPLICATE INDEPENDENTLY
Plasmids; Minipreparation; Minprep; PDNA; F plus cell; F-pili; F-duction; Multicopy plasmid; Plasmide; Plasmid vector; Theta-type plasmid; Theta type plasmid; Col plasmid; Megaplasmid; DNA plasmids; Linear plasmid
['plazm?d]
¦ noun Biology a genetic structure in a cell that can replicate independently of the chromosomes, especially a small circular DNA strand in a bacterium or protozoan.
Origin
1950s: from plasma + -id2.

Wikipedia

Transfer DNA binary system

A transfer DNA (T-DNA) binary system is a pair of plasmids consisting of a T-DNA binary vector and a vir helper plasmid. The two plasmids are used together (thus binary) to produce genetically modified plants. They are artificial vectors that have been derived from the naturally occurring Ti plasmid found in bacterial species of the genus Agrobacterium, such as A. tumefaciens. The binary vector is a shuttle vector, so-called because it is able to replicate in multiple hosts (e.g. Escherichia coli and Agrobacterium).

Systems in which T-DNA and vir genes are located on separate replicons are called T-DNA binary systems. T-DNA is located on the binary vector (the non-T-DNA region of this vector containing origin(s) of replication that could function both in E. coli and Agrobacterium, and antibiotic resistance genes used to select for the presence of the binary vector in bacteria, became known as vector backbone sequences). The replicon containing the vir genes became known as the vir helper plasmid. The vir helper plasmid is considered disarmed if it does not contain oncogenes that could be transferred to a plant.

Examples of use of plasmid DNA
1. The drug contains diphtheria toxin, the strongest toxin known to science, and plasmid DNA, which will cause the toxin to attack only the cancer cells that contain the gene, while leaving the surrounding cells unharmed.