Eight genes controlling the presence or absence of carbohydrate fermentation in Saccharomyces.

Abstract

SUMMARY: Genes controlling carbohydrate fermentation in Saccharomyces often control the fermentation of more than one carbohydrate. The gene MZ has at least five different manifestations involving its ability to respond to five different carbohydrate inducers for the production of a single enzyme; a series of multiple alleles of MZ differ from one another in ability to respond to the different inducers. The gene DX controls the fermentation of dextrin and glycogen. The gene ST controls the fermentation of starch; some starch-positive cultures are Schardinger-dextrin-positive. The gene SU controls the production of a constitutive enzyme which splits both sucrose and raffinose.