Yeast Nitrogen Base without Amino acids and without Ammonium sulphate

Yeast Nitrogen Base is nutrient-rich medium with sources of nitrogen, vitamins, trace elements and salts. It acts as the basic nutrient medium for most fermentation reactions involving yeast cultures. Yeast Nitrogen Base with and without added amino acids for the cultivation of yeast and for classification based on amino acid and carbon requirements, respectively. Yeast Nitrogen Base without Amino Acids and without Ammonium Sulfate has the same formulation as Yeast Nitrogen Base without Amino Acids except that Ammonium Sulfate as a source of Nitrogen has been omitted to test the ability of yeast cells to assimilate different nitrogen sources for example Potassium nitrate.