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Genetic control of maltase formation in yeast

✍ Scribed by Khan, Nasim A.

Publisher
Springer
Year
1975
Tongue
English
Weight
374 KB
Volume
136
Category
Article
ISSN
0026-8925

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✦ Synopsis

Temperature-sensitive mutants affecting maltose utilization in the yeast Saccharomyces cerevisiae have been isolated. Two such mutants although failing to ferment maltose at the restrictive temperature, have normal induced level of maltase. The third mutant (UNT-37) not only failed to ferment maltose but has 5-6 fold less induced level of maltase at the restrictive temperature than the parental strain. The genetic control mechanisms of maltase induction and maltose utilization have been discussed.

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Competition experiments between yeast strains which were either inducible or constitutive for maltase synthesis were performed. The experiments showed a selective advantage of ceils with an inducible maltase over cells with a constitutive maltase. However, with respect to the carbon source of the me