Abstract
Homologous recombination was used in a previous study to correct a 2-base-pair deletion in the third constant domain (Cmu3) of the haploid chromosomal mu gene in a mutant hybridoma cell line by transfer of a pSV2neo vector bearing a subfragment of the normal Cmu region (M.D. Baker, N. Pennell, L. Bosnoyan, and M.J. Shulman, Proc. Natl. Acad. Sci. USA 85:6432-6436, 1988). In these experiments, both gene replacement and single reciprocal crossover events were found to restore normal, cytolytic 2,4,6-trinitrophenyl-specific immunoglobulin M production to the mutant cells. In the cases of single reciprocal recombination, the structure of the recombinant mu gene is such that the normal Cmu region, in its correct position 3' of the expressed 2,4,6-trinitrophenyl-specific heavy-chain variable region, is separated from the mutant Cmu region by the integrated vector sequences. I report here that homologous recombination occurs with high frequency between the duplicate Cmu regions in mitotically growing hybridoma cells. The homologous recombination events were easily detected since they generated hybridomas that were phenotypically different from the parental cells. Analysis of the recombinant cells suggests that gene conversion is the m...Continue Reading
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Citations
Aug 28, 2007·DNA Repair·Ania RukśćMark D Baker
Mar 6, 2007·DNA Repair·Shauna A Lee, Mark D Baker
Feb 12, 2008·Journal of Molecular Biology·Ania RukśćMark D Baker
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