Kvasny Prum. 1985; 31(2): 29-33 | DOI: 10.18832/kp1985005

Comparison of differences of flour - grist estimated with various types of mills.Peer-reviewed article

V. VONDREJS, B. JANDEROVÁ, O. BENDOVÁ

Killer-toxins (zymocins) are proteins produces by killer strains of yeasts and yeast-like organisms. An ability to produce a killer toxin and resistance to it (i. e. the killer-character) are determined by doublestranded RNA and only rarely by DNA. The killer-toxins kill sensitive strains of yeasts. A molecular mechanism of killer-toxin action and expression of the killer-character have been already determined in several canes. Transfer of the killer character among yeast cells is possible by means of sexual hybridization, induced protoplast fusion or cytoduction. Killer yeasts can be cured of their killer character. A new method of selection, polyploidization and killer strain construction by means of killer factor have been described. Possibility of killer toxin application against pathologenic yeast and an yeast contamination of industrial products is mentioned. The use of genetic determinants of the killer character in genetic engineering of yeast is promising.
(In Czech, English summary only)

Keywords: fermentation, yeasts, zymocins

Published: February 1, 1985