Summary
Strains that are genotypically sensitive to chloramphenicol and also contain one of the nuclear suppressors of mitochondrial chloramphenicol resistance (Waxman et al. 1979) were constructed. A manganese mutagenesis on such a strain produced chloramphenicol resistant mutants, most of which resulted from mutations in nuclear genes. These mutants may be either dominant or recessive, and they probably do not code for membrane proteins. The few mitochondrial mutants fall into several classes, but all result from mutations in the 21S rRNA gene. The suppressor allele effectively prevents the appearance of the most common group of mitochondrial mutants (those that map at cap1), and thereby enhances the selection of novel mutants in the region.
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Knight, J.A., Wedeen, C.J. & Hughes, K.A. Nuclear suppressors of mitochondrial chloramphenicol resistance in Baker's yeast: their use for the isolation of novel mutants. Curr Genet 8, 121–126 (1984). https://doi.org/10.1007/BF00420230
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DOI: https://doi.org/10.1007/BF00420230