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HOMOLOGOUS RECOMBINATION VECTOR [3 records]

Record 1 2011-02-10

English

Subject field(s)
  • Biotechnology
  • Genetics
  • Molecular Biology
DEF

A cloning vehicle which has cleavage sites for two or more restriction endonucleases, thus defining a fragment of DNA which can be removed and replaced by foreign DNA.

CONT

Making more subtle mutations : the "knock in". Although it is often desirable to simply inactivate a gene to determine the importance of a null phenotype, in many cases it is more informative not to inactivate a gene, but rather to modify it so that its function is altered. Again, this is a task(which is the logical equivalent of site directed mutagenesis in a plasmid) that can be solved by homologous recombination. In this case a targeting vector is designed as a replacement vector so that additional genetic sequence are added into the genome. This technique is sometimes called a "knock-in".

French

Domaine(s)
  • Biotechnologie
  • Génétique
  • Biologie moléculaire
DEF

Véhicule de clonage comportant un ou plusieurs sites de coupure pour une enzyme de restriction donnée définissant ainsi un fragment d'ADN pouvant être éliminé et remplacé par de l'ADN étranger.

CONT

Thomas et Capecchi ont au contraire muté le gène Hprt dans des cellules ES en utilisant deux types de construction déduits des mécanismes de recombinaison connus chez la levure : des vecteurs de remplacement, dont les séquences viennent remplacer les séquences homologues endogènes, et des vecteurs d'insertion, dont les séquences s'insèrent au milieu des séquences endogènes.

Spanish

Campo(s) temático(s)
  • Biotecnología
  • Genética
  • Biología molecular
Save record 1

Record 2 2010-02-23

English

Subject field(s)
  • Genetics
CONT

The only viral sequences included in the gutless vector are those needed in cis for its replication and packaging. We found that a loxP site next to the packaging site of the gutless virus was necessary to neutralize homologous recombination between... and the gutless viruses within their packaging domains.

French

Domaine(s)
  • Génétique
CONT

Une des stratégies proposées pour y pallier est de concevoir des vecteurs n'exprimant plus de gènes viraux (gutless vector). Ces constructions, testées chez l'animal, donnent des résultats contradictoires et mettent en évidence que l'immunogénécité, la stabilité de l'expression génique et la persistance in vivo des «gutless vectors» varient en fonction de plusieurs facteurs : origine exacte du vecteur, nature du tissu cible et nature du gène thérapeutique inséré.

Spanish

Save record 2

Record 3 2009-07-28

English

Subject field(s)
  • Biotechnology
  • Molecular Biology
CONT

Homologous recombination vectors are transfected into ES [embryonic stem] cells via electroporation.

French

Domaine(s)
  • Biotechnologie
  • Biologie moléculaire
DEF

Plasmide spécialisé qui induit une recombinaison homologue lorsqu'on l'introduit dans des cellules ES [souches embryonnaires].

Spanish

Save record 3

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