Abstract
Thioxanthine is toxic for mammalian cells transformed by the dominant selectable marker gpt. It allowed us to select, in the presence of the endogenous hypoxanthine-guanine phosphoribosyltransferase gene, mutants that did not express gpt any more and also hybrid cells that had lost the chromosome carrying it. The gpt marker is thus dominant in negative as well as in positive selection, which makes it potentially very useful for genetic studies of mammalian cells.
MeSH Terms
Animals
Escherichia coli/enzymology,genetics
Genes
Genes, Bacterial
Genes, Dominant
Hybrid Cells/cytology,enzymology
Hypoxanthine Phosphoribosyltransferase/genetics
Mice
Mutation
Pentosyltransferases/genetics
Teratoma/enzymology,genetics
Transcription, Genetic
Xanthines/toxicity
Chemicals
Xanthines
6-thioxanthine
Pentosyltransferases
xanthine phosphoribosyltransferase
Hypoxanthine Phosphoribosyltransferase
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Besnard C
Institut Jacques Monod, Unité 257 de I'Institut National de la Santé et de la Recherche Médicale, Université Paris VII, France.
Monthioux E
Jami J
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