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- W73166686 abstract "ABSTRACT During growth on glucose S. cerevisiae exhibits two alternative trehalose accumulation patterns: TAC(+) (active) and tac(-) (inactive). TAC(+) is obtained in strains bearing MAL4C, a constitutive gene regulating maltose fermentation. Non-fermenting (mal) and inducible (MAL) strains are tac(-). Trehalose accumulation was determined in different strains bearing MAL2, MAL4 and MAL6 alleles. Constitutive alleles at any of the three loci gave the TAC(+) pattern, whereas inducible alleles were tac(-). Allelic mutants (mal2 and MAL2) obtained from a constitutive MAL2C strains were tac(-). Segregation of TAC(+) from a cross of MAL2C:x mal was 2:2, and TAC(+) was always linked to MAL2C. Therefore, TAC(+) is controlled by the same polygenic system that regulates maltose fermentation, provided the MAL allele is constitutive. A mutation which results in a deficiency in UDPG-dependent trehalose-P synthase was found to segregate independent of MAL2C. This mutation destroys the ability of cells to convert glucose to trehalose in nonproliferating cells, but does not prevent accumulation of trehalose during growth on glucose medium if MAL2C is present. Since the presence of the MAL2C gene permits trehalose accumulation during growth, but does not alter the deficiency in the UDPG-dependent synthase, the existence of two alternative pathways of trehalose synthesis appears highly probable. KEYWORDS Trehalose-P synthase, constitutive MAL genes, maltose fermentation, genetics, trehalose." @default.
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- W73166686 date "1981-01-01" @default.
- W73166686 modified "2023-09-26" @default.
- W73166686 title "GENETIC RELATIONSHIP BETWEEN MALTOSE AND TREHALOSE METABOLISM" @default.
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- W73166686 doi "https://doi.org/10.1016/b978-0-08-025382-4.50049-6" @default.
- W73166686 hasPublicationYear "1981" @default.
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