Trans2-Blue Chemically Competent Cell is specifically designed for chemical transformation of DNA. It permits a transformation efficiency of over 109 cfu/μg DNA (tested by pUC19 plasmid DNA). The competent cell is resistant to tetracycline (TetR) and chloramphenicol (CamR).



TetRΔ(mcrA)183Hte[F′{proAB lacIq lacZΔM15Tn10(TetR)AmyCamR}]Δ(mcrCB-hsdSMR-mrr)173 endA1 supE44 thi-1 recA1 gyrA96 relA1



• High transformation efficiency (>1×109cfu/μg DNA).

• Suitable for larger plasmids and recombinant products.

• Reduced preference for plasmid size, suitable for library construction.

• Used in Blue/White selection.



•Equilibrate a water bath to 42oC.

•Warm a vial of SOC medium or LB medium to room temperature. Warm selective plates at 37oC for 30 minutes.

•Thaw a vial of 100 μl of Trans2-Blue Chemically Competent Cell on ice, aliquot 50 μl of the cells into a prechilled 1.5 ml tube, add target DNA (1 to 5 μl ) into the tube. Do not mix by pipetting up and down. Incubate the cells on ice for 30 minutes.

•Heat-shock the cells for 30 seconds at 42oC without shaking. Immediately transfer the tube to ice. Incubate on ice for 2 minutes without shaking.

•Add 500 μl of prewarmed SOC medium or LB medium (without antibiotic) into the tube, mix well and shake at 37oC for 1 hour at 200 rpm for cell recovery and for the expression of antibiotic resistance.

•Spread 20 to 200 μl from each transformation vial on a prewarmed selective plate. The remaining can be stored at 4oC and plated the next day if needed.

•Invert the plate and incubate at 37oC overnight.

•Select colonies and analyze by restriction enzyme digestion, PCR, or sequencing.



•Higher efficiency transformation can be achieved by transforming cells immediately following thawing.

•Avoid repeated thawing.

•Gentle handling is required for the entire procedure.


Contents& storage


Citations & references
Identification of genes directly involved in shell formation and their functions in pearl oyster, Pinctada fucataPLoS One 3.73 Fang D, et al. 2011

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Trans2-Blue Chemically Competent Cell

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  • Product Code: CD411
  • Availability: In Stock
  • $130.00

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