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Competent Cells

Chemically modified bacterial cells capable of uptaking DNA from the environment via transformation. Competent cultures of E. coli are used in the lab for various procedures including cloning, protein expression, and genetic library creation.
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46 – 60 of 364 results
46

MilliporeSigma™ Novagen™ BL21(DE3) pLysS Competent Cells

BL21 host strain that expresses T7 RNA polymerase and also encode T7 lysozyme that suppresses basal expression of toxic target proteins prior to induction.

Content And Storage ≤-70°C
Efficiency Guaranteed efficiency: >2 x 107 cfu/μg
47

MilliporeSigma™ Novagen™ Rosetta-gami™ B (DE3) Competent Cells

Rosetta-gami B strains combine the key features of BL21, Origami, and Rosetta to enhance both the expression of eukaryotic proteins and the formation of target protein disulfide bonds.

Content And Storage ≤-70°C
48

MilliporeSigma™ Novagen™ Rosetta-gami™ B (DE3) pLacI Competent Cells

Rosetta-gami B strains combine the key features of BL21, Origami, and Rosetta to enhance the expression of eukaryotic proteins. Contains the pLacI plasmid producing extra Lac repressor.

49

MilliporeSigma™ Novagen™ Rosetta-gami™ B Competent Cells

Rosetta-gami B strains combine the key features of BL21, Origami, and Rosetta to enhance both the expression of eukaryotic proteins and the formation of target protein disulfide bonds.

Content And Storage ≤-70°C
50

MilliporeSigma™ Novagen™ Rosetta™ 2 Competent Cells

Novagen's Rosetta™ 2 host strains are BL21 derivatives designed to enhance the expression of eukaryotic proteins that contain codons rarely used in E. Coli.

Content And Storage ≤-70°C
Efficiency Guaranteed efficiency: >2 x 106 cfu/μg
51

MilliporeSigma™ Novagen™ Rosetta™ 2 (DE3) Singles Competent Cells
GSA_VA

Novagen's Rosetta™ 2 host strains are BL21 derivatives designed to enhance the expression of eukaryotic proteins that contain codons rarely used in E. Coli.

Content And Storage ≤-70°C
Efficiency Guaranteed efficiency: >2 x 106 cfu/μg
52

MilliporeSigma™ Novagen™ Rosetta™ 2(DE3)pLacI Competent Cells
GSA_VA

Rosetta strains are BL21 derivatives designed to enhance the expression of eukaryotic proteins that contain codons rarely used in E. coli. Contains the pLacI plasmid producing extra Lac repressor.

Content And Storage ≤-70°C
Efficiency Guaranteed efficiency: 2 x 106 cfu/μg
53

MilliporeSigma™ Novagen™ Veggie NovaBlue Singles™ Competent Cells

Produces high-quality plasmid DNA

Content And Storage ≤-70°C
Efficiency Guaranteed efficiency: >1.5 x 108 cfu/μg
55

MilliporeSigma™ Novagen™ Rosetta™ 2(DE3)pLysS Competent Cells

Novagen's Rosetta™ 2 host strains are BL21 derivatives designed to enhance the expression of eukaryotic proteins that contain codons rarely used in E. Coli.

Content And Storage ≤-70°C
Efficiency Guaranteed efficiency: >2 x 106 cfu/μg
56

MilliporeSigma™ Novagen™ Origami™ B Competent Cells

Origami B host strains carry the same mutations as the original Origami strain, except that they are derived from a lacZY mutant of BL21 to enable precise control of expression levels using IPTG.

Content And Storage ≤-70°C
Efficiency Guaranteed efficiency: >2 x 106 cfu/μg
57

MilliporeSigma™ Novagen™ Origami™ B (DE3) Competent Cells

Origami B host strains carry the same mutations as the original Origami strain, except that they are derived from a lacZY mutant of BL21 to enable precise control of expression levels using IPTG.

Content And Storage ≤-70°C
Efficiency Guaranteed efficiency: >2 x 106 cfu/μg
58

MilliporeSigma™ Novagen™ Origami™ B Competent Cell Set

Origami B host strains carry the same trxB/gor mutations as the original Origami strains, except that they are derived from a lacZY mutant of BL21.

59

MilliporeSigma™ Novagen™ HT96™ NovaBlue Competent Cells

High-efficiency competent cells predispensed in 96-well plate for high-throughput applications

Content And Storage Store HT96 Competent Cells, SOC Medium and Test Plasmid at -70°C or below. Store Cap Strips, Plate Lids and Reagent Reservoirs at room temperature
Efficiency > 1 x 108CFU/μg
For Use With (Application) For high-throughput transformation
60

MilliporeSigma™ Novagen™ Tuner™ Competent Cell Set

Tuner™ strains are lacZY deletion mutants of BL21 and enable adjustable levels of protein expression throughout all cells in a culture.