Yeast Nitrogen Base (YNB) w/ Ammonium Sulphate is used for the growth of all strains of Saccharomyces cerevisiae, suppling the required nutritional elements for budding yeast cells. This media is used for the classification of yeast strains based on the carbon and nitrogen requirements and it contains all the essential vitamins and inorganic salts which is required for the propagation of yeast cells. Addition of , amino acids and carbon sources is required. Used for preparation of SD/SDA