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Mammalian Expression System

Transient Protein Expression Service

Mammalian cells have the ability to perform comprehensive post-translational modifications and to secrete glycoproteins that are correctly folded and contain complex antennary oligosaccharides with terminal sialic acid. Mammalian cells are widely used in the production of recombinant proteins, antibodies, virus, viral-subunit proteins, and gene-therapy vectors in which post-translational modification and appropriate protein folding is crucial to the desired applications.

GenScript's transient protein expression service offers fast production and delivery of recombinant proteins and monoclonal antibodies up to grams level. We also offer stable cell line services if you need continued source for your protein and antibody production.


  • Competitive Advantages
  • Protein Expression
  • Case Study
  • Related Services
Customers provide: Deliverables Timeline
1~5 ug construct or Target protein sequence
  • Optimized gene sequence report (if starting material is target protein sequence)
  • Purified protein or Antibody, as required
  • Additional protein if required
  • QC data
  • 8-12 weeks
  • 293TGE™ Transient Expression Technology: HEK293TGE cells in large-scale suspension culture can be quickly adapted to express/secrete high levels of your protein of interest. We also provide 16N- or 13C- labeled protein expression.

Quotations and Ordering

  • To request a quotation, please fill in the Quotation Form and send it to us by email or fax. Download the Quotation Form in following list:
    • For mammalian transient gene expression and protein production service, please download the
  • To order, please send the completed Quotation Form to us by email or fax with a formal PO (Purchase Order) or credit card information. You can also submit PO/credit card information by phone or via our secure online messaging system.
  • If submitting samples, please mail them together with a hard copy of the completed Quotation/Order Form to: Bioprocess Services, GenScript, 860 Centennial Avenue., Piscataway, NJ 08854, US.

Our customer service representatives are available 24 hours a day, Monday through Friday, to assist you.