产品信息：

中文名称：无氨基酵母氮源    

英明名称：YNB/Yeast Nitrogen Base Without Amino acids 

酵母氮源-无氨基酸
说明： 氨基酸与碳水化合物需求基础上酵母分类。
外观： 白色或近白色粉末
储存条件： 粉末室温保存，溶液2-8℃保存。

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.