Yeast Cultivation - Application of MES and Bis-Tris in pH Management

Yeast Cultivation - Application of MES and Bis-Tris in pH Management


Yeast cultivation is a common experimental technique in biological science, used for research in cell biology, genetics, biochemistry, and other fields. Controlling the pH of the culture medium has a significant impact on the survival and reproductive lifespan of yeast cells. The following will detail the basic concepts of yeast cultivation, the importance of pH control therein, relevant market applications, and the use of pH-regulating agents such as MES and Bis-Tris in this technique.

Basic Concepts of Yeast Cultivation

Yeast cultivation is a widely used biological technique, employed in exploring fields such as cell biology and genetics. Common yeasts include Saccharomyces cerevisiae and Schizosaccharomyces pombe. The formulation of the culture medium needs to be adjusted according to the experimental purpose and the requirements of the yeast strain, including carbon sources, nitrogen sources, inorganic salts, and vitamins. Yeast growth requires appropriate temperature, pH, and oxygen supply, typically at temperatures around 30°C and pH levels maintained between 5 to 6. The growth process of yeast cultivation usually follows a specific growth curve, including lag phase, exponential phase, stationary phase, and death phase.

Importance of pH Control

pH is an important parameter in the culture medium, directly affecting yeast growth, metabolism, and physiological status. Abnormally high or low pH levels may inhibit yeast growth, affecting the accuracy of experimental results. pH variations can affect the activity of intracellular enzymes, thereby influencing cellular metabolic pathways and energy production. Research indicates that controlling the pH of the culture medium can affect the lifespan of yeast cells. Proper pH conditions help extend the actual lifespan of cells, thereby improving the repeatability of experiments and the accuracy of results.

Introduction to MES and Bis-Tris

  • MES (2-(N-Morpholino) ethanesulfonic acid)
    MES is a buffering agent commonly used to maintain pH stability in biological experiments. It is a colorless, odorless powder that is readily soluble in water. Due to its good buffering capacity within the pH range of 6-7, it is often used in yeast cultivation to maintain appropriate pH conditions.
  • Bis-Tris
    Bis-Tris is a buffering agent with the full name 2-[Bis(2-Hydroxyethyl)amino]-2-(Hydroxymethyl)propane-1,3-diol. Its pH range is 5.8-7.2, making it suitable for yeast cultivation. Similar to MES, Bis-Tris also exhibits good pH stability, ensuring the stability of the culture medium.

Application of MES and Bis-Tris in Yeast Cultivation

In the process of pH control, researchers commonly use pH-regulating agents such as MES and Bis-Tris to maintain the stable pH of the culture medium. These compounds effectively adjust the pH of the culture medium, ensuring the growth and reproduction of yeast in suitable environments. MES and Bis-Tris are widely used in yeast cultivation, contributing to the accuracy and repeatability of experiments.

Market Applications

  • Biotechnology and Biopharmaceuticals
    • Promotion of pH control technology in yeast cultivation
      Controlling the pH of yeast cultivation within the range of 6 has been shown to extend the actual lifespan of cells, thereby increasing the production efficiency and quality in biotechnology and biopharmaceutical fields. In addition to common agents like MES, pH-regulating agents such as Bis-Tris show potential and could be viable options for promoting this technology. This will drive the demand for pH control technology in the field, promoting the expansion and application of related products.
  • Pharmaceutical Production
    • Application in yeast-based drug production
      Yeasts play a crucial role as host cells in the production of antibiotics, insulin, growth hormones, and other drugs in biopharmaceutical manufacturing. Their efficient metabolic pathways and easily manipulable gene expression systems make yeasts an ideal choice in the field of biopharmaceuticals.
  • Growth Hormone Manufacturing Market
    • Application of recombinant DNA technology
      The production of growth hormone API (Somatropin) utilizes recombinant DNA technology, with yeast as the host cell. The development of this technology drives the demand for related buffering agent products, such as pH-regulating agents for controlling the pH of the culture medium. Therefore, the yeast growth hormone manufacturing market presents a potentially favorable market for promoting buffering agent products.


Yeast cultivation is an important biological technique, and pH control is crucial for ensuring the success of experiments and the accuracy of results. Proper pH conditions promote yeast growth and metabolism, potentially bringing about new market opportunities. The application of pH-regulating agents like MES and Bis-Tris further enriches the scope of yeast cultivation techniques, contributing to the advancement of research and applications in related fields.