Library Efficiency™ DH5α™ Competent Cells

Catalog number:  18263012

 Related applications: Transformation

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Library Efficiency® DH5α™ Competent Cells are a versatile strain of chemically competent cells that demonstrate transformation efficiencies of >1 x 108 cfu/µg plasmid DNA. Library Efficiency® DH5α™ Competent Cells are ideal for difficult cloning constructions or any application that uses limiting amounts of DNA. Features of these cells:

• Supports blue/white screening by α-complementation on plates containing X-Gal or Bluo-Gal
• Maintains plasmid DNA with minimum recombination events
• Delivers high-yield plasmid preparations for downstream applications
• M13mp cloning vectors may be propagated on a lawn of DH5α-FT™, DH5αF'™, DH5αF'IQ™, JM101, or JM107 for plaque formation

Ideal for difficult cloning projects
Library Efficiency® DH5α™ Competent Cells are recommended for routine cloning of genes into large plasmids, and are suitable for difficult clone constructions, such as blunt-end ligations. Library Efficiency® DH5α™ Competent Cells have a mid-range transformation efficiency (>1 x 108 cfu/µg control DNA per 100 µL reaction). The strain also has the Φ80lacZΔM15 genotype, allowing blue/white screening on plates containing either X-Gal or Bluo-Gal. Finally, the recA1 mutation helps reduce the rate of recombination while propagating plasmid DNA, and the endA1 mutation makes DH5α™ cells an excellent choice for amplifying plasmid DNA for subsequent extraction and purification.

Genotype: F- Φ80lacZΔM15 Δ(lacZYA-argF) U169 recA1 endA1 hsdR17(rk-, mk+) phoA supE44 thi-1 gyrA96 relA1 λ-
For Research Use Only. Not for use in diagnostic procedures.


Competent Cell Type: Chemically Competent
Species: E. coli
Format: Tube(s)
Transformation Efficiency: > 1x10^8
Bacterial or Yeast Strain: DH5α™
Product Line: DH5a™, Library Efficiency®
Blue-White Screening: Yes
Cloning Methylated DNA: No
Cloning Unstable DNA: Not Suitable for cloning unstable DNA
F' Episome (to make ssDNA): Lacks F' Episome
High Throughput Compatibility: Not High Throughput-Compatible (Manual)
Improves Plasmid Quality: Yes
Preparing Unmethylated DNA: Not Suitable for preparing unmethylated DNA
Product Size: 10 reactions
Propagating ccdB Vectors: Not for ccdB vector propagation
Reduces Recombination: Yes
T1 Phage - Resistant (tonA): No
Shipping Condition: Dry Ice

Contents & storage

• Library Efficiency® DH5α™ Competent Cells: 5 vials, 200 µl each (total of 1 ml)
• pUC19 DNA (10 pg/ul): 1 vial, 50 µl
• S.O.C. medium: 2 bottles, 6 ml each

Store Competent Cells at -80°C. Store pUC19 DNA at -20°C. Store SOC Medium at 4C or at Room Temperature.


Manuals & protocols

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