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Invitrogen™ Zero Blunt™ TOPO™ PCR Cloning Kit, without competent cells Available on GSA/VA Contract for Federal Government customers only.

$245.00 - $358.00

Products 2
Catalog Number Mfr. No. Description Price Qty Availability  
Catalog Number Mfr. No. Description Price Qty Availability  
45-024-5 Non-distribution product as customer accommodation. Available on GSA/VA Contract for Federal Government customers only.
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N/A 25 reactions
Each for $358.00
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45-124-5 Non-distribution product as customer accommodation. Available on GSA/VA Contract for Federal Government customers only.
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N/A Zero Blunt TOPO PCR Cloning Kit
Each for $245.00
Add to cart


Includes the Zero Blunt TOPO vector containing the ccdB gene for positive selection, only permitting growth of plasmid vectors with recombinants. Resistant to Kanamycin (KanR) and Zeocin™ (ZeoR).
pCRBlunt II-TOPO vector: designed for proofreading polymerases
The pCRBlunt II-TOPO vector is designed to clone blunt-ended PCR products generated by thermostable proofreading polymerases such as Platinum™ Pfx DNA Polymerase. The pCRBlunt II-TOPO vector contains:

  • EcoRI sites flanking the PCR product insertion site for easy excision of inserts
  • Kanamycin and Zeocin resistance genes for your choice of selection in E. coli
  • SP6 promoter/primer site for in vitro RNA transcription and sequencing
  • M13 forward and reverse primer sites for sequencing or PCR screening
pCRBlunt II-TOPO clone selection
pCRBlunt II-TOPO allows for direct selection of recombinants via disruption of the lethal E. coli gene, ccdB. The vector contains the ccdB gene fused to the C-terminus of the LacZα fragment. Ligation of a blunt-end PCR product disrupts expression of the LacZα-ccdB gene fusion, permitting growth of only positive recombinants upon transformation. Cells that contain non-recombinant vector are killed upon plating. Therefore, blue/white screening is not required.
Simplified TOPO-based cloning
Using TOPO cloning technology, there is no need for PCR primers containing specific sequences, post-PCR procedures, vector preparation, or other time-intensive DNA manipulation steps. Just add your PCR reaction straight to the provided topoisomerase-charged vector, incubate 5 minutes, and transform E. coli competent cells.
Efficient cloning
With up to 95% of clones carrying the desired insert, you can screen fewer clones, saving you time and money. The pCRBlunt II-TOPO vector used in this kit comes with lethal ccdB gene for efficient selection of blunt-ended PCR recombinants products generated by thermostable proofreading polymerases.
The standard in cloning
When it comes to cloning, TOPO™ cloning technology has been a reliable partner for thousands of scientists for over ten years. Fast, simple-to-use, and efficient, TOPO™ cloning has been applied to many different vectors for a wide array of applications.
Zero Blunt TOPO PCR Cloning Kit options
The Zero Blunt TOPO PCR Cloning Kit for direct insertion of blunt-ended PCR products into a plasmid vector can be purchased with a variety of competent cells that deliver different advantages depending upon your needs
General cloning: TOP10 cells (Cat. No. K2800-20, K2800-40)
High-efficiency cloning: TOP10 Electrocomp™ Cells (Cat. No. K2860-01, K2860-40)
General cloning, bacteriophage T1 resistance: DH5α-T1R (Cat. Nos. K2820-20, K2820-40)
Fast growth: Mach1™-T1R Chemically Competent E. Coli (Cat. No. K2830-20)
Provide your own: for flexibility and to save money (Cat. No. 450254)
A version of the kit that includes a PureLink™ Quick Plasmid Miniprep Kit (Cat. No. K2800-02) for use in isolation of clean, sequencing-ready, recombinant plasmid is also available.

  • Fast and easy: go from PCR to clones in just three steps and in as little as 5 minutes hands-on time
  • Efficient: obtain up to 95% clones with correct insert
  • Proven: reliable performance for over a decade with over 4,000 citations
  • Simple: no ligase, post-PCR procedures, or PCR primers containing specific sequences are required
  • Vector: pCR™Blunt II-TOPO vector: contains the ccdB gene, allowing for direct selection of recombinants
  • Cloning method: TOPO cloning: Topoisomerase I–based, 5-minute ligation of blunt-ended PCR products amplified with proofreading thermostable polymerases
  • Competent cells: Various options: choose from kits with either general, high-efficiency, bacteriophage T1-resistant, fast-growing competent cells (available separately) or use your own
  • Antibiotic resistance: Ampicillin (AmpR), Kanamycin (KanR)

Cloning, PCR Cloning

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