Thermo Fisher, K15101, Champion™ pET151 Directional TOPO™ Expression Kit with BL21 Star™ (DE3) One Shot™ Chemically Competent E. coli

Champion™ pET151 Directional TOPO™ Expression Kit with BL21 Star™ (DE3) One Shot™ Chemically Competent E. coli The Champion™ pET Expression System yields the highest-level protein production inE. coli. During expression, your protein of interest can reach levels greater than 50 percent of total cellular protein. Based on T7 expression vectors originally developed by Studier and colleagues (1-3), high-level expression is achieved because the T7 RNA polymerase is more processive than nativeE. coliRNA polymerase and is dedicated to the transcription of your gene of interest. Protein production is further enhanced in the system by the expression strain BL21 Star™E. coli, which significantly improves the stability of mRNA transcripts and increases protein expression up to ten-fold.
Simplified, efficient Directional TOPO™ cloning allows you to quickly enter a Champion™ pET Expression vector. These kits feature linearized, topoisomerase I-activated Champion™ pET expression vectors for five-minute directional cloning. Directional TOPO™ Cloning technology facilitates gene expression because:
• A proofreading enzyme is used for PCR, resulting in fewer errors in cloned genes
• Greater than 90% of the clones are in the correct orientation for gene expression, reducing the time spent on colony screeningSeven Champion™ pET Directional TOPO™ Expression Vectors are available (Figure 1 and Table 1): Each vector carries a T7lacpromoter for high-level expression. Flexible options for simplifying protein detection, cleaving purification tags, selecting plasmid carrying clones, and/or improving protein yields are available.
With the Champion™ pET Directional TOPO™ vectors you can expect highest-level protein production. Figure 2 shows expression of thelacZ gene in Champion™ pET Directional TOPO™ vectors. Figure 3 demonstrates efficient cleavage using TEV protease of the N-terminal tag of a β-galactosidase fusion protein expressed from pET151/D-TOPO™.
Antibiotic Resistance Bacterial: Ampicillin (AmpR)
Bacterial or Yeast Strain: BL21 Star™(DE3)
Cleavage: TEV Protease Recognition Site
Constitutive or Inducible System: Inducible
Expression Mechanism: Cell-Based Expression
Expression System: E. coli
Inducing Agent: IPTG
Product Type: TOPO Expression Kit
Quantity: 20 reactions
Selection Agent (Eukaryotic): None
Vector: pET
Cloning Method: Directional TOPO
Product Line: One Shot™
Promoter: T7, lacO
Protein Tag: His Tag (6x), V5 Epitope Tag
Unit Size: Each