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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Conversion of homothallic yeast to heterothallism through HO gene disruption.

A simple method was developed for the conversion of homothallic Saccharomyces cerevisiae yeast strains to heterothallism through HO gene disruption. An integrative ho::neo disrupted allele was constructed by cloning a dominant selectable marker, the bacterial neo gene, within the HO gene. Transformation of a homothallic diploid S. cerevisiae strain with plasmid DNA containing the ho::neo allele yielded G418-resistant yeast transformants in which one of the HO alleles was replaced by the disrupted ho::neo allele. Meiotic tetrad analysis of four-spored asci from these G418-resistant transformants gave rise to haploid heterothallic and diploid homothallic tetrad progeny. The presence of the ho::neo and HO alleles in the heterothallic and homothallic progeny was confirmed by Southern-blot analysis.[1]


  1. Conversion of homothallic yeast to heterothallism through HO gene disruption. van Zyl, W.H., Lodolo, E.J., Gericke, M. Curr. Genet. (1993) [Pubmed]
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