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Related Concept Videos

Upstream Processing01:27

Upstream Processing

Upstream processing represents a critical phase in biomanufacturing, wherein biological systems such as microorganisms, mammalian cells, or insect cells are cultivated to produce therapeutic proteins, vaccines, enzymes, or other biologically derived products. This phase encompasses all steps from the selection and genetic manipulation of the production organism to the cultivation of cells in bioreactors under tightly controlled environmental conditions.Host Selection and Genetic OptimizationThe...

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Related Experiment Video

Updated: May 28, 2026

Efficient Mammalian Cell Expression and Single-step Purification of Extracellular Glycoproteins for Crystallization
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Efficient Mammalian Cell Expression and Single-step Purification of Extracellular Glycoproteins for Crystallization

Published on: December 23, 2015

Optimizing transient recombinant protein expression in mammalian cells.

Ralph F Hopkins1, Vanessa E Wall, Dominic Esposito

  • 1Protein Expression Laboratory, SAIC-Frederick, Inc., Frederick, MD, USA.

Methods in Molecular Biology (Clifton, N.J.)
|October 12, 2011
PubMed
Summary
This summary is machine-generated.

Transient gene expression (TGE) in mammalian cells can be improved for cytoplasmic protein production. Recombinational cloning and enhanced transfection protocols increase speed and lower costs for routine recombinant protein expression.

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Cell Biology

Background:

  • Transient gene expression (TGE) is crucial for producing recombinant proteins in mammalian cells.
  • Current TGE methods primarily focus on secreted proteins, with less development in improving cytoplasmic expression.
  • Mammalian cell expression offers advantages like native post-translational modifications and improved protein folding for eukaryotic proteins.

Purpose of the Study:

  • To enhance TGE technology for improved cytoplasmic recombinant protein production in mammalian cells.
  • To address limitations in low-cost, high-throughput mammalian cell expression systems.
  • To increase the diversity of DNA vectors for protein production.

Main Methods:

  • Utilized recombinational cloning techniques.
  • Implemented improved transfection protocols to increase speed and reduce costs.
  • Focused on optimizing conditions for cytoplasmic protein expression in mammalian cell lines.

Main Results:

  • Demonstrated a combined approach using recombinational cloning and improved transfection protocols.
  • Showcased increased amenability of mammalian cells for routine recombinant protein expression.
  • Facilitated faster and more cost-effective protein production.

Conclusions:

  • The integration of recombinational cloning and optimized transfection protocols significantly enhances TGE for cytoplasmic protein production.
  • This approach makes mammalian cells a more viable and efficient platform for routine recombinant protein expression.
  • Further development in these areas is critical for meeting the growing demand for recombinant proteins.