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Expression Competent Cells

  • BL21 Chemically Competent Cell
  • BL21 Chemically Competent Cell
  • BL21 Chemically Competent Cell
BL21 Chemically Competent CellBL21 Chemically Competent CellBL21 Chemically Competent Cell

BL21 Chemically Competent Cell

  • Product Introduction
  • Manual Download
  • References


BL21 Chemically Competent Cell is specifically designed for chemical transformation of DNA. It is resistant to TetR and permits a transformation efficiency of over 107 cfu/μg DNA (tested by pUC19 plasmid DNA).


E. coli B F- dcm omp T hsdS(rB-mB-) gal [malB+]K-12(λ S)


• Transformation efficiency: >107 cfu/μg (pUC19 DNA).

• TetR.

• Tight expression control ideal for toxic protein expression.

• Control plasmid II (Amp+) is used for detection of expression function of cell. The protein size is about 26 kDa.


at -70°C for six months. Do not store in liquid nitrogen

Literature Journal IF Author Date Link
An autoinhibitory mechanism modulates MAVS activity in antiviral innate immune response NATURE COMMUNICATIONS 11.47 Yuheng Shi, et al. 2015 Jul The original link
A green strategy to immobilize silver nanoparticles onto reverse osmosis membrane for enhanced anti-biofouling property desalination 5.5269 Chenxi Dong,et al. 2017Jan The original link
Substitutions in Spodoptera exigua topoisomerase I modulate its relaxation activity and camptothecin sensitivity pest management science 3.25 Pei Zhang et al State Key Laboratory for Biology o 2017 Jun The original link
The essential roles of core binding factors CfRunt and CfCBF?? in hemocyte production of scallop Chlamys farreri Developmental & Comparative Immunology 3.238 Feng Yue, et al. Key Laboratory of Experimental Ma 2014 Jun The original link
A teleost complement factor Ba possesses antimicrobial activity and inhibits bacterial infection in fish developmental and comparative immunology 3.2 Li XP et al 2017 Jun The original link