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HB101 Electrocompetent Cells
Intact Genomics (ig®) HB101 Electrocompetent E. coli Cells are suitable for high-efficiency transformation in a wide variety of applications such as cloning and sub-cloning. E. coli HB101 is a K12 x B hybrid strain, containing the recA13 mutation that minimizes recombination and helps insert stability. In addition, it carries the hsdS20(rB-mB-) restriction minus genotype which prevents cleavage of cloned DNA by endogenous restriction enzymes. HB101 strain does not support Alpha-complementation for blue/white screening.
Price range: $129.00 through $479.00
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Product Description
Specifications
Competent cell type: Electrocompetent
Derivative of: HB101
Species: E. coli
Format: Tubes
Transformation efficiency: ≥4 x 1010 cfu/µg pUC19 DNA
Blue/white screening: No
Shipping condition:Dry ice
Reagents Needed for One Reaction
ig® HB101 Electrocompetent Cells: 25 µl
DNA (or pUC19 Control, 10 pg/µl): 1 µl
Recovery medium: 1 ml
Storage
ig® HB101 Electrocompetent cells: -80 ºC
pUC19 control DNA: -20 ºC
Recovery medium: 4 ºC
Genotype
F- Lambda- araC14 leuB6(Am) DE(gpt-proA)62 lacY1 glnX44(AS) galK2(Oc) recA13 rpsL20(strR) xylA5 mtl-1 thiE1 hsdS20(rB-, mB-)
Quality Control
Transformation efficiency is tested by using the pUC19 control DNA supplied with the kit and using the high-efficiency transformation protocol. Transformation efficiency should be greater than 1×108 CFU/µg pUC19 DNA. Untransformed cells are tested for appropriate antibiotic sensitivity.
General Guidelines
Follow these guidelines when using ig® HB101 Electrocompetent 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.
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High Efficiency Transformation Protocol
Use this procedure to transform ig® HB101 electrocompetent cells. Do not use these cells for chemical transformation.
1. Place sterile cuvettes and microcentrifuge tubes on ice.
2. Remove competent cells from the -80 °C freezer and thaw completely on wet ice (10-15 minutes).
3. Aliquot 1 µl (1 pg-10 ng) of DNA to the chilled microcentrifuge tubes on ice.
4. When the cells are thawed, add 25 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 the 25 µl of cells on ice. Mix well by tapping. Do not pipette up and down or vortex to mix, this can harm cells and decrease transformation efficiency.
5. Pipette 26 µl of the cell/DNA mixture into a chilled electroporation cuvette without introducing bubbles. Quickly flick the cuvette downward with your wrist to deposit the cells across the bottom of the well and then electroporate.
6. Immediately add 974 µl of Recovery Medium or any other medium of choice to the cuvette, pipette up and down three times to re-suspend the cells. Transfer the cells and Recovery Medium to a culture tube.
7. Incubate tubes at 37 °C for 1 hour at 210 rpm.
8. Dilute the cells as appropriate then spread 20-200 μl cells onto a pre-warmed selective plate. For the pUC19 control, plate 50 μl of diluted transformants onto an LB plate containing 100 μg/ml ampicillin. Use sterilized spreader or autoclaved ColiRoller™ plating beads to spread evenly.
9. Incubate the plates overnight at 37 °C.
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