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Genomic Instability: An increased tendency of the Genome to acquire Mutations when various processes involved in maintaining and replicating the genome are dysfunctional.
 JoVE Biology

Combining Magnetic Sorting of Mother Cells and Fluctuation Tests to Analyze Genome Instability During Mitotic Cell Aging in Saccharomyces cerevisiae

1Department of Biological Sciences, Rensselaer Polytechnic Institute


JoVE 51850

Mutation rates in young Saccharomyces cerevisiae cells measured through fluctuation tests are used to predict mutation frequencies for mother cells of different replicative ages. Magnetic sorting and flow cytometry are then used to measure actual mutation frequencies and age of mother cells to identify any deviations from predicted mutation frequencies.

 JoVE Immunology and Infection

Identifying DNA Mutations in Purified Hematopoietic Stem/Progenitor Cells

1Greehey Children's Cancer Research Institute, UT Health Science Center at San Antonio, 2Department of Cellular and Structural Biology, UT Health Science Center at San Antonio, 3Department of Pathology, UT Health Science Center at San Antonio, 4Department of Microbiology, UT Health Science Center at San Antonio, 5Cancer Therapy and Research Center, UT Health Science Center at San Antonio


JoVE 50752

Here we describe an in vivo mutagenesis assay for small numbers of purified hematopoietic cells using the LacI transgenic mouse model. The LacI gene can be isolated to determine the frequency, location, and type of DNA mutants spontaneously arisen or after exposure to genotoxins.

 JoVE Biology

Quantitation and Analysis of the Formation of HO-Endonuclease Stimulated Chromosomal Translocations by Single-Strand Annealing in Saccharomyces cerevisiae

1Irell & Manella Graduate School of Biological Sciences, 2Department of Molecular and Cellular Biology, City of Hope Comprehensive Cancer Center and Beckman Research Institute, 3Department of Biochemistry and Molecular Biology, University of Southern California, Norris Comprehensive Cancer Center


JoVE 3150

The HO-stimulated translocation assay monitors single-strand annealing following the creation of DNA double-strand breaks at multiple loci in diploid Saccharomyces cerevisiae. This mechanism may model genome rearrangements in somatic cells of higher eukaryotes following exposure to high doses of ionizing radiation.

 JoVE Biology

A Fluorescence-based Exonuclease Assay to Characterize DmWRNexo, Orthologue of Human Progeroid WRN Exonuclease, and Its Application to Other Nucleases

1Department of Biochemistry, University of Oxford


JoVE 50722

Exonucleases play critical roles in ensuring genome stability. Loss of WRN exonuclease function results in premature aging. Studying substrates and other requirements of the nuclease in vitro can help elucidate its role in vivo. Here we demonstrate a rapid and reproducible fluorescence-based assay to measure its nuclease activity.

 JoVE Biology

The Green Monster Process for the Generation of Yeast Strains Carrying Multiple Gene Deletions

1Department of Synthetic Biology and Bioenergy, J. Craig Venter Institute, 2Department of Microbial and Environmental Genomics, J. Craig Venter Institute, 3Donnelly Centre & Department of Molecular Genetics, University of Toronto, 4Lunenfeld Research Institute, Mt Sinai Hospital


JoVE 4072

The Green Monster method enables the rapid assembly of multiple deletions marked with a reporter gene encoding green fluorescent protein. This method is based on driving yeast strains through repeated cycles of sexual assortment of deletions and fluorescence-based enrichment of cells carrying more deletions.

 JoVE Biology

Generation of RNA/DNA Hybrids in Genomic DNA by Transformation using RNA-containing Oligonucleotides

1School of Biology, Georgia Institute of Technology


JoVE 2152

This work shows how to form an RNA/DNA hybrid at the chromosomal level and reveal transfer of genetic information from RNA to genomic DNA in yeast cells.

 JoVE Biology

Environmentally Induced Heritable Changes in Flax

1Department of Biology, Case Western Reserve University


JoVE 2332

Growing some flax varieties under nutrient stress results in genomic variation within a subset of the genome and phenotypic variation. A complex insertion at a specific site is associated with growth under various nutrient regimes and with changes in gene expression around this site.

 JoVE Clinical and Translational Medicine

Processing of Human Reduction Mammoplasty and Mastectomy Tissues for Cell Culture

1Life Science Division, Lawrence Berkeley National Laboratory


JoVE 50011

A method to process human mammary surgical discard material is described. Processed tissue, in the form of organoids, can be stored frozen indefinitely or placed in culture for long-term growth. This method enables experimental examination of normal human epithelial cell biology, and the effects of exogenous perturbations.

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