The sequence encoding a superoxide dismutase (SOD) was isolated from the cDNA library of a zinc-tolerant strain of the ericoid mycorrhizal fungus Oidiodendron maius, grown under zinc-stress conditions. Sequence homology to other SODs strongly suggests that it is a copper- and zinc-containing SOD. Functional complementation assays showed that the gene confers increased tolerance to zinc and copp...

Multiple types of nutrient transceptors, membrane proteins that combine a transporter and receptor function, have now been established in a variety of organisms. However, so far all established transceptors utilize one of the macronutrients, glucose, amino acids, ammonium, nitrate, phosphate or sulfate, as substrate. This is also true for the Saccharomyces cerevisiae transceptors mediating acti...

The alcohol dehydrogenase (ADH’) of yeast has twice the molecular weight of the ADH of horse liver (l), contains 4 gm. atoms of zinc (2), and binds 4 moles of DPN per mole of protein (1). The liver ADH binds 2 moles of coenzyme per mole (3). These facts prompted the prediction that the liver ADH should contain 2 gm. atoms of zinc per mole of protein (2). The presence of 2 atoms of zinc in liver...

The Fe content in animal feeds is highly variable. The availability of Fe in feeds varies with the feed and the form in which Fe is present. The present study reports the effect of the addition of different concentrations of Fe from yeast biomass on Fe bioavailability and Fe level in rat liver, compared with a diet containing Fe-sulphate (Fe-sulphate) addition (control) and with a diet without ...