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HPRT [2 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 1991-09-12

English

Subject field(s)
  • Biochemistry
  • Biophysics
DEF

An enzyme of the transferase class that catalyzes the reaction hypoxanthine (of guanine) + 5 - phospho - alpha - Delta - ribose I - disphosphate = inosine 5' - monophosphate (or guanasine 5' - monoiphosphate) + pyrophosphate.

French

Domaine(s)
  • Biochimie
  • Biophysique
CONT

Une modification directe du gène Hprt(hypoxanthine phosphoribosyltransférase), pour lequel il est possible de sélectionner les cellules possédant cette fonction(avec le milieu HAT : hypoxanthine-aminoptérine-thymidine) ou au contraire les cellules qui l'ont perdue(avec la 6-TG : 6-thioguanine) peut aussi être obtenue.

Spanish

Save record 2

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