Yeast Nitrogen Base without amino acids

酵母氮源（无氨基酸，含硫酸铵，不含碳水化合物）

Storage：RT

Appearance……………….white to off-white powder

Solubility…………………...clear to slightly hazy yellow solution at 0.67% (w/v) in water

说明：Yeast Nitrogen Base without Amino Acids is used for classifying yeasts based on amino acid and carbohydrate requirements. It contains all essential vitamins and inorganic salts necessary for the cultivation of yeasts except histidine, methionine, tryptophan and a source of carbohydrate.

Preparation instructions：

1. Prepare a 10× stock solution by suspending 6.7 g of yeast nitrogen base, 5 g of glucose or an equivalent amount of other carbohydrate, and 5-10 mg of the desired amino acid in 100 mL of distilled water.

2. Warm if necessary to solubilize and sterilize by filtration.

Store 10× stock solution at 2-8 °C. To use, dilute 1:10 with sterile distilled water under aspetic conditions.

100g            350元           货号：Y291920-100g