Library Efficiency™ DH5α Competent Cells

Catalog number:  18263012

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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: 200 µL
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