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5-Alpha Chemically Competent Cells


ig 5-Alpha
Intact Genomics 5-alpha chemically competent E. coli cells are suitable for high efficiency transformation in a wide variety of applications such as cloning and sub-cloning. ig 5-alpha chemically competent cells are at least twice the transformation efficiency of the nearest competitor.

    Number of Colonies per Transformation Test*

  • Up to 2x higher efficiency than any competitor
  • Exact same Genotype as NEB's 5-Alpha Cells

Competent cell type:        Chemically competent
Derivative of:                    5-alpha
Species:                            E. coli
Format:                             Tubes
Transformation efficiency:      1 x 109 cfu/µg pUC19 DNA
Blue/white screening:           Yes
Shipping condition:               Dry ice

Quality Control
Quality control is performed following the production of each new lot of product to ensure that it meets the quality standards and specifications designated for the product. Each lot is repeatedly compared side-by-side with leading competitors to ensure our products outperform the competitor before product launching. 

Reagents Needed for One Reaction
ig 5-alpha chemically competent cells:  50 µl
DNA (or pUC19 Control, 10 pg/µl):           1 µl
Recovery medium:                                   1 ml

Contents & Storage
ig 5-alpha competent cells:   -80 °C
pUC19 control DNA:                 -20 °C
Recovery medium:                       4 °C

80 (lacZ)M15 fhuA2 (argF-lacZ)U169 phoA glnV44 gyrA96 recA1 relA1 endA1 thi-1hsdR17

General Guidelines
Follow these guidelines when using ig 5-alpha chemically competent cells.

  • Handle competent cells gently as they are highly sensitive to changes in temperature or mechanical lysis caused by pipetting.
  • Thaw competent cells on ice, and transform cells immediately following thawing. After adding DNA, mix by tapping the tube gently. Do not mix cells by pipetting or vortexing.


    • Remove competent cells from the -80 °C freezer and thaw completely on wet ice (10-15 minutes).
    • Aliquot 1-5 µl (1 pg-100 ng) of DNA to the chilled microcentrifuge tubes on ice.
    • When the cells are thawed, add 50 μl of cells to each DNA tube on ice and mix gently by tapping 4-5 times. For the pUC19 control, add 1 µl of (10 pg/µl) DNA to a chilled microcentrifuge tube, prior to adding 50 µl of cells. Mix well by tapping. 4) Incubate the cells with DNA on ice for 30 minutes.
    • After 30 minute ice incubation, heat shock the cells at 42 °C for 45 seconds.
    • Transfer the tubes to ice for 2 minutes.
    • Add 950 µl of Recovery Medium or any other medium of choice to each tube.
    • Incubate tubes at 37 °C for 1 hour at 210 rpm.
    • Spread 50 μl to 200 μl from each transformation on Pre-warmed selection plates.
    • Incubate the plates overnight at 37 °C.


Type of Competent Cell
Chemically competent
Cell species
E. coli
SKU Number Type of Competent Cell Cell species Volume Web Price Quantity Add to Cart
1031-12 Chemically competent E. coli 12 x 50uL
1031-24 Chemically competent E. coli 24 x 50uL
1034-24 Chemically competent E. coli 6 x 200uL
1034-48 Chemically competent E. coli 12 x 200uL
ig 5-alpha
5-Alpha Chemically Competent Cells
On Order