Oriental Veterinary Medicine: Talk about the difference between yeast powder and yeast extract powde

Yeast nitrogen source is commonly used in fermentation culture, mainly including yeast powder, yeast extract and yeast extract. There is not much difference between yeast extract and yeast extract in essence, both of which belong to yeast extract, and their basic mechanism is roughly the same.

Dongfang Veterinary Medicine believes that yeast powder is relatively low-end in terms of bioavailability. Macromolecules such as protein, nucleic acid, glycogen, etc. in yeast cells have not been degraded because there is no wall break, and microorganisms need to synthesize corresponding decomposing enzymes to make use of them. Therefore, yeast powder takes a long time to be fully absorbed and utilized, so it is suitable for varieties with complete microbial enzymes and long fermentation culture cycle. For example, the production of antibiotics such as avermectin, chlortetracycline and erythromycin; Due to wall-breaking and enzymolysis, the macromolecular substances in yeast cells have been decomposed into micromolecule substances by degradation, which can be directly absorbed and utilized by microorganisms. Therefore, the absorption and utilization rate is higher than that of yeast powder. Compared with yeast powder, yeast powder is more suitable for the cultivation of genetically engineered bacteria with metabolic defects and microorganisms with harsh nutritional conditions.