EMS-induced mutant frequency and spectrum in bone marrow of D6-2 transgenic mice

Science in China. Series C, Life Sciences
L HuaixingF Jiliang

Abstract

EMS-induced mutant frequency and mutation spectrum as well as background mutant frequency have been characterized fur bone marrow of the D6-2 transgenic mice. ThelacI genes carried on pSPORT1 vectors were recovered from the treated or untreated mouse genomic DNA by excision and circularization, and analyzedin vitro for mutations that occurred in the mouse bone marrow, lacI(-) mutants were positively selected with the M9/L media. The 6 lacI(-) mutants were identified out of 11 935 vectors recovered from genomic DNA of the treated mice (mutant frequency was 50 x 10(5)), while no mutant was found in 11 649 vectors Imm untreated mice (the background mutant frequency wan lower than 8.6 x 10(-5)). Two regions oflacI for each mutant, in which the majority of sensitive sites for inactivation of thelacI gene product have been located, were sequenced and 16 mutation events were identified. The predominant mutations (14/16 or 87.5%) were base substitutions, whereas the remaining 2 mutations were single base deletions (12.5%). Of these base substitutions, transversions made up 9/14 or 64%, and transitions cornprised 5/14 or 36%, These findings were markedly different from the spontaneous spectra characterized by using Big-Blue system, as w...Continue Reading

References

Oct 1, 1991·Genetics·R M Schaaper, R L Dunn
Dec 1, 1990·Genetic Analysis, Techniques and Applications·S W KohlerJ M Short
Oct 1, 1989·Proceedings of the National Academy of Sciences of the United States of America·J A GossenJ Vijg
Jun 1, 1994·Mutation Research·J A GossenJ Vijg
Jun 1, 1994·Mutation Research·M J DycaicoJ M Short
Jul 1, 1993·Mutation Research·G S ProvostJ M Short
Jan 1, 1993·Trends in Genetics : TIG·J Gossen, J Vijg
May 12, 2000·Journal of Tongji Medical University = Tong Ji Yi Ke Da Xue Xue Bao·L Meng

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