Gene Trapping in Mouse Embryonic Stem Cells

  • Jane Brennan
  • William C. Skarnes
Part of the METHODS IN MOLECULAR BIOLOGY™ book series (MIMB, volume 461)

1. Introduction

Gene trapping in mouse embryonic stem (ES) cells offers a method to create random developmental mutants with a direct route to cloning and defining the expression pattern of the disrupted gene (1). Gene trapping involves the use of reporter gene constructs that are activated following insertion into endogenous transcription units. A number of plasmid- and retroviral-based vectors have been developed, which differ in their requirements for reporter gene activation (reviewed in refs. 2 and 3). “Promoter trap” vectors simply consist of a promot-erless reporter gene that is activated following insertions in exons of genes. In contrast, “gene trap” vectors contain a splice acceptor sequence upstream of a reporter and are activated following insertions into introns of genes. Both promoter and gene trap insertions create a fusion transcript from which a portion of the endogenous gene may be readily cloned (4,5). The pattern of reporter gene activity can be monitored in...


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Copyright information

© Springer Science + Business Media, LLC 2008

Authors and Affiliations

  • Jane Brennan
    • 1
  • William C. Skarnes
    • 2
  1. 1.Centre for Integrative PhysiologyUniversity of EdinburghEdinburghUK
  2. 2.Wellcome Trust Sanger InstituteWellcome Trust Genome CampusHinxtonUK

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