ISSN:
1617-4623
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Two dominant uninducible mutant alleles in the gal80 locus were identified. The GAL80 s-1 and GAL80 s-2 mutants showed novel phenotypes in response to the newly isolated GAL81-1 mutant allele, a dominant constitutive mutation linked to the gal4 locus; the GAL80 s-1 GAL81-1 strain was inducible and the GAL80 s-2 GAL81-1 strain was uninducible. Many galactose positive revertants from the GAL80 s-2 GAL81-1 strain were isolated. It was proved that each revertant was due to a secondary mutation either in the gal80 or GAL81 locus, whereas revertants due to mutation at the supposed controlling site for the structural gene cluster of the galactose-pathway enzymes have not been isolated.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00268810
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