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Production of Pharmaceuticals01:30

Production of Pharmaceuticals

Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under sterile, tightly...
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Lectins: production and practical applications.

Sze Kwan Lam1, Tzi Bun Ng

  • 1Division of Respiratory Medicine, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China. lamszekwan@yahoo.com.hk

Applied Microbiology and Biotechnology
|October 5, 2010
PubMed
Summary

Lectins are carbohydrate-binding proteins with diverse biological activities. This review covers lectin production methods and their potential applications in medicine and agriculture.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Science

Background:

  • Lectins are proteins with carbohydrate-binding domains, enabling specific interactions with monosaccharides and oligosaccharides.
  • Found across diverse organisms, lectins play roles in cellular recognition and have various biological activities.

Purpose of the Study:

  • To review the production methods of lectins, including isolation from natural sources and recombinant DNA technology.
  • To explore the diverse practical applications of lectins, highlighting their potential in various fields.

Main Methods:

  • Lectins are isolated using chromatographic techniques.
  • Recombinant DNA technology is employed for lectin production.
  • Yields of plant lectins, like legume lectins, often surpass those of animal lectins.

Main Results:

  • Lectins exhibit a wide range of activities, including antitumor, immunomodulatory, antifungal, and inhibitory effects on HIV-1 reverse transcriptase.
  • Some lectins possess anti-insect, antibacterial, and anti-nematode properties.
  • The production yields vary significantly between animal and plant lectin sources.

Conclusions:

  • Lectins represent a versatile class of proteins with significant therapeutic and agricultural potential.
  • Advancements in production technologies are crucial for harnessing the full spectrum of lectin applications.
  • Further research into lectin activities could unlock novel applications in medicine and pest control.