酵母营养缺陷型培养基补充剂

Transformation is the process by which exogenous DNA is introduced into a cell, resulting in a heritable change or genetic modification. This was first reported in Streptococcus pneumoniae by Griffith in 1928. Transforming principle of DNA was demonstrated by Avery et al. in 1944.

转化是将外源DNA引入细胞，引起遗传变异或基因修饰的过程。1928年，Griffith首次报道了利用肺炎链球菌进行的转化。Avery等人于1944年证明了DNA转化的原理。

The development of genetic engineering and cloning has opened many possibilities of expression and isolation of heterologous proteins for research purposes. Considerable advances in technology have enabled expression and isolation of recombinant proteins in large scale.

基因工程和克隆的发展为研究领域开辟了表达和分离异源蛋白质的许多可能性。技术上巨大进步使得能够大规模表达和分离重组蛋白。

Yeasts are considered model systems for eukaryotic studies as they exhibit fast growth and have dispersed cells.

酵母因能够快速生长并具有分散的细胞而被认为是用于真核生物研究的模范系统。

Yeast Drop Out Bulletin. The selection of plasmids in yeast is based on the use of auxotrophic mutant strains, which cannot grow without a specific medium component (an amino acid, purine or pyrimidine). Transformation with a plasmid containing the mutated gene enables the transformant to grow on a medium lacking the required component. Although yeast can grow on a synthetic medium without any amino acids, better yield and growth rate can be achieved on richer media.

酵母因能够快速生长并具有分散的细胞而被认为是用于真核生物研究的模范系统。酵母培养物可采用类似于细菌培养物的技术在液体培养基或琼脂平板上进行生长、维持和保存。