Skip to Content
Merck
CN
All Photos(4)

Documents

Safety Information

CMC0016

Sigma-Aldrich

BL21(DE3) Electrocompetent Cells

Escherichia coli, rod shaped

Synonym(s):

BL21 strain

Sign Into View Organizational & Contract Pricing
All Photos(4)

About This Item

UNSPSC Code:
41106202
NACRES:
NA.85

product name

BL21(DE3) Electrocompetent Cells, for protein expression

biological source

Escherichia coli

grade

for molecular biology

growth mode

adherent or suspension

morphology

rod shaped

technique(s)

microbiological culture: suitable

cell transformation

competent cell type: electrocompetent
transformation efficiency: ≥5 × 109 cfu/μg

shipped in

dry ice

storage temp.

−70°C

Related Categories

General description

The BL21(DE3) Electrocompetent Cells are the first to offer high efficiency cloning and high level protein expression in the same cell.
Cloning efficiencies are increased 25-1,000 fold relative to other preparations of BL21 cells, which is essential for construction of complex expression libraries.

Genotype

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

Features and Benefits

The unprecedented transformation efficiency of the BL21(DE3) Electrocompetent Cells (> 5 × 109 cfu/μg) eliminates the need for plasmid transfer from the cloning strain to the expression strain, saving days of work in a typical cloning and expression experiment

Components

  • BL21(DE3) electrocompetent cells
  • pUC 19 transformation control DNA
  • recovery medium for expression


WGK

WGK 3

Regulatory Information

新产品

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Felix Nicolaus et al.
eLife, 10 (2021-02-09)
We follow the cotranslational biosynthesis of three multispanning Escherichia coli inner membrane proteins in vivo using high-resolution force profile analysis. The force profiles show that the nascent chain is subjected to rapidly varying pulling forces during translation and reveal unexpected
Julianne M Troiano et al.
eLife, 10 (2021-01-16)
Under high light, oxygenic photosynthetic organisms avoid photodamage by thermally dissipating absorbed energy, which is called nonphotochemical quenching. In green algae, a chlorophyll and carotenoid-binding protein, light-harvesting complex stress-related (LHCSR3), detects excess energy via a pH drop and serves as
Zev A Ripstein et al.
eLife, 9 (2020-01-10)
The ClpXP degradation machine consists of a hexameric AAA+ unfoldase (ClpX) and a pair of heptameric serine protease rings (ClpP) that unfold, translocate, and subsequently degrade client proteins. ClpXP is an important target for drug development against infectious diseases. Although
Salvatore Di Girolamo et al.
Microbial cell factories, 19(1), 170-170 (2020-08-29)
Miniaturization of biochemical reaction volumes within artificial microcompartments has been the key driver for directed evolution of several catalysts in the past two decades. Typically, single cells are co-compartmentalized within water-in-oil emulsion droplets with a fluorogenic substrate whose conversion allows
Brandon R Lowe et al.
eLife, 10 (2021-02-02)
Sequencing of cancer genomes has identified recurrent somatic mutations in histones, termed oncohistones, which are frequently poorly understood. Previously we showed that fission yeast expressing only the H3.3G34R mutant identified in aggressive pediatric glioma had reduced H3K36 trimethylation and acetylation
View All Related Papers

Protocols

BL21(DE3) Electrocompetent Cells

Efficient BL21(DE3) electrocompetent cell transformation protocol ensures optimal settings for high efficiency.

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