RT Journal Article SR Electronic(1) A1 Mas, Jaime A1 Glender, Walter A1 PiƱa, EnriqueYR 1980 T1 Action of Ergosterol, Glucose, Cyclic AMP and Ca2+ on Mating Ability in Kluyveromyces lactis JF Microbiology, VO 121 IS 2 SP 433 OP 440 DO https://doi.org/10.1099/00221287-121-2-433 PB Microbiology Society, SN 1465-2080, AB Haploid strains of Kluyveromyces lactis were used to study the factors that influence mating ability. Analysis of sterol extracts of cells showed that ergosterol acts like a mating-control sterol, depending on the frequency of subculture and the content of intracellular Ca2+. Mating reaction was abolished in yeast cells placed in contact with the ionophore A23187 when Ca2+was absent from the medium. Glucose at concentrations above 1% in the medium repressed the mating process; this repression could be reversed by either dibutyryl cyclic AMP or caffeine. In starved cells glucose stimulated mating ability if provided in the presence of oxygen; in these experiments cyclic AMP and caffeine had no effect., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-121-2-433