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Inducible Systems

Products >  Inducible_Systems >  Tetracycline-Inducible_Expression >  FBS

Fetal Bovine Serum for Cell Culture (Tetracycline-Free)

High-quality Tet System Approved Fetal Bovine Serum for cell culture has been functionally tested* to ensure that it permits the full range of tetracycline-regulated induction with well-characterized Tet cell lines. As the exclusive licensed distributor of tetracycline-controlled gene expression systems, only Clontech is certified to offer FBS that can ensure optimum induction with all tetracycline inducible gene expression systems. Other commercial cell culture serum products may contain tetracycline-derived contaminants which can dramatically affect the inducible regulation of Tet Systems.

Because Clontech's Tet-On and Tet-Off Systems are extremely sensitive, even “antibiotic-free” fetal bovine serum that has no negative effect on cell growth may still exhibit enough activity to alter Tet-regulated gene expression. You can be confident that Tet System Approved FBS will not adversely affect Tet-On or Tet-Off experiments.

*Testing for the presence of tetracyclines in fetal or calf serum is not equivalent to the highly sensitive functional testing that is performed on Clontech Tet System Approved FBS.

Two Versions of Tet System Approved Fetal Bovine Serum Are Available

  • US-Sourced FBS: A premium cell culture serum that is collected in the United States.
  • Tet System Approved FBS: An economical alternative obtained from non-US, USDA-approved sources.

All sera are subjected to the same rigorous testing to ensure full inducibility.

  At-A-Glance   Documents   Images & Data   Resources


  • The only fetal bovine serum that is functionally tested with Clontech's tetracycline inducible expression systems.
  • Proven track record—17 years providing Tet Approved FBS
  • Ensures lowest background expression with Clontech's Tet-On 3G System


  • Tetracycline inducible expression in mammalian cells
  • Controllable expression in stem cells

Additional Information

Please see the product's Certificate of Analysis for information about storage conditions, product components, and technical specifications. Please see the Kit Components List to determine kit components. Certificates of Analysis and Kit Components Lists are located under the Documents tab.

Cat. # Product Contents Size Price Units Select
631106 Tet System Approved FBS 500 mL $840.00
631107 Tet System Approved FBS 50 mL $110.00
631367 Tet System Approved FBS 3 x 500 mL $2,268.00
631101 Tet System Approved FBS, US-Sourced 500 mL $850.00
631105 Tet System Approved FBS, US-Sourced 50 mL $115.00
631368 Tet System Approved FBS, US-Sourced 3 x 500 mL $2,295.00



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