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Protein Expression & Purification

Products >  Protein_Expression_and_Purification >  Baculovirus_Expression >  BacPAK_Expression_System

Baculovirus Expression System—A Complete System

To generate large amounts of a recombinant protein, many investigators have turned to baculovirus expression systems. Compared to bacterial expression systems, the posttranslational processing and folding of recombinant proteins produced in insect cells more closely resembles mammalian processes, and the yields of functional protein are often much greater.

BacPAK Method

The BacPAK System uses the baculovirus Autographa californica nuclear polyhedrosis virus (AcMNPV) to produce target proteins in insect cells. The target gene is inserted into a shuttle vector, which is cotransfected into insect host cells with the linearized BacPAK6 Viral DNA. The specially designed BacPAK6 Viral DNA forces recombination between the virus and transfer vector, resulting in high recombination efficiency. Following recombination, a few viral plaques are picked and purified, and the recombinant phenotype is verified. The newly isolated recombinant virus can then be amplified and used to infect insect cell cultures to produce large amounts of the desired protein.

If you wish, you can use pBacPAK8-GUS (sold as part of the BacPAK Baculovirus Expression System) as a positive control for the cotransfection step. This transfer vector has the E. coli beta-glucuronidase (GUS) gene cloned downstream of its polyhedrin promoter. Recombination of pBacPAK8-GUS with the BacPAK6 DNA digest generates recombinant viruses that express beta-glucuronidase. Expression of GUS can be detected by generation of a blue color from the chromogenic GUS substrate X-GLUC.

  At-A-Glance   Documents   Images & Data   Resources


  • Yields up to 500 mg of protein per liter of culture
  • Recombinant efficiency >90%
  • Proper protein folding
  • Expression of biologically active proteins
  • Eukaryotic posttranslational modification


  • Recombinant protein expression in insect host 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
631402 BacPAK™ Baculovirus Expression System Each $867.00
631401 BacPAK™6 DNA (Bsu36 I digest) 5 Transfections $513.00
631721 X-GLUC 100 mg $335.00


Required Products
Cat. # Product Contents Size Price # of Units Select
631411 IPLB-Sf21 Insect Cells 1 Vial $106.00



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