All Photos(4)



BL21(DE3) pLysE Chemically Competent Cells

for protein expression



for molecular biology

cell transformation

competent cell type: chemically competent
transformation efficiency: ≥1 x 107 cfu/μg

shipped in

dry ice

storage temp.


General description

The BL21(DE3) pLysE Chemically Competent Cells produce T7 lysozyme to repress low-level transcription from the T7 promoter prior to IPTG induction, helping to stabilize inserts coding for deleterious products.
These cells have a higher level of repression by T7 lysozyme, offering the greatest control over expression of inserts.


F – ompT hsdSB (rB- mB-) gal dcm (DE3)

Features and Benefits

  • a transformation efficiency of >1 × 107 cfu/μg.
  • economical prices
  • offering superior value for everyday protein expression work.


  • BL21(DE3) pLysE chemically competent cells
  • pUC 19 transformation control DNA
  • recovery medium for expression

Storage Class Code

12 - Non Combustible Liquids

Certificate of Analysis

Certificate of Origin

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service