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69053

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BLR(DE3) Competent Cells - Novagen

BLR is a recA derivative of BL21 that improves plasmid monomer yields and may help stabilize target plasmids containing repetitive sequences.

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biological source

Escherichia coli

Quality Level

100

manufacturer/tradename

Novagen®

storage condition

OK to freeze
avoid repeated freeze/thaw cycles

growth mode

adherent or suspension

morphology

rod shaped

technique(s)

microbiological culture: suitable

cell transformation

transformation efficiency: >2×106 cfu/μg

shipped in

dry ice

storage temp.

−70°C

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694547092070624
BLR(DE3) Competent Cells - Novagen BLR is a recA derivative of BL21 that improves plasmid monomer yields and may help stabilize target plasmids containing repetitive sequences.

Sigma-Aldrich

69053

BLR(DE3) Competent Cells - Novagen

HMS174(DE3)pLysS Competent Cells - Novagen HMS174 strains provide high transformation efficiencies and the recA mutation in a K-12 background. T7 lysozyme expression suppresses basal T7 expression.

Sigma-Aldrich

69454

HMS174(DE3)pLysS Competent Cells - Novagen

Rosetta(DE3)pLacI Competent Cells - Novagen 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.

Sigma-Aldrich

70920

Rosetta(DE3)pLacI Competent Cells - Novagen

Tuner(DE3)pLysS Competent Cells - Novagen Tuner host strains are lacZY deletion mutants of BL21, which enable adjustable levels of protein expression throughout all cells in a culture. T7 lysozyme expression suppresses basal T7 expression.

Sigma-Aldrich

70624

Tuner(DE3)pLysS Competent Cells - Novagen

manufacturer/tradename

Novagen®

manufacturer/tradename

Novagen®

manufacturer/tradename

Novagen®

manufacturer/tradename

Novagen®

growth mode

adherent or suspension

growth mode

adherent or suspension

growth mode

adherent or suspension

growth mode

adherent or suspension

morphology

rod shaped

morphology

rod shaped

morphology

rod shaped

morphology

rod shaped

technique(s)

microbiological culture: suitable

technique(s)

microbiological culture: suitable

technique(s)

microbiological culture: suitable

technique(s)

microbiological culture: suitable

shipped in

dry ice

shipped in

dry ice

shipped in

dry ice

shipped in

dry ice

General description

Genotype: F-ompT hsdSB(rB- mB-) gal lac ile dcm Δ(srl-recA)i306::Tn10 (tetR)(DE3)





This product contains genetically modified organisms (GMO). Within the EU GMOs are regulated by Directives 2001/18/EC and 2009/41/EC of the European Parliament and of the Council and their national implementation in the member States respectively. This legislation obliges us to request certain information about you and the establishment where the GMOs are being handled. Click here for Enduser Declaration (EUD) Form.
BLR is a recA- derivative of BL21 that improves plasmid monomer yields and may help stabilize target plasmids containing repetitive sequences or whose products may cause the loss of the DE3 prophage (1, 2).

DE3 indicates that the host is a lysogen of λDE3, and therefore carries a chromosomal copy of the T7 RNA polymerase gene under control of the lacUV5 promoter. Such strains are suitable for production of protein from target genes cloned in pET vectors by induction with IPTG.
BLR is a recA derivative of BL21 that improves plasmid monomer yields and may help stabilize target plasmids containing repetitive sequences.

Components

0.4 ml1 mlComponent

•2 × 0.2 ml5 × 0.2 mlBLR(DE3) Competent Cells

•2 × 2 ml4 × 2 mlSOC Medium

•2 ng2 ngTest Plasmid

Warning

Toxicity: Multiple Toxicity Values, refer to MSDS (O)

Other Notes

1. A. Roca (U. of Wisconsin), personal
communication.

2. Studier, F. W. (1991) J. Mol. Biol. 219,
37-44.

Legal Information

NOVAGEN is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

10 - Combustible liquids

WGK

WGK 2

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Jugal P Dhandhukia et al.
Bioconjugate chemistry, 28(11), 2715-2728 (2017-09-25)
Recombinant protein-polymer scaffolds such as elastin-like polypeptides (ELPs) offer drug-delivery opportunities including biocompatibility, monodispersity, and multifunctionality. We recently reported that the fusion of FK-506 binding protein 12 (FKBP) to an ELP nanoparticle (FSI) increases rapamycin (Rapa) solubility, suppresses tumor growth
Julia R Widom et al.
Molecular cell, 72(3), 541-552 (2018-11-06)
Numerous classes of riboswitches have been found to regulate bacterial gene expression in response to physiological cues, offering new paths to antibacterial drugs. As common studies of isolated riboswitches lack the functional context of the transcription machinery, we here combine
Veronika Altmannova et al.
iScience, 25(11), 105439-105439 (2022-11-18)
During meiosis, programmed DNA double-strand breaks (DSBs) are repaired by homologous recombination. DMC1, a conserved recombinase, plays a central role in this process. DMC1 promotes DNA strand exchange between homologous chromosomes, thus creating the physical linkage between them. Its function
U Loi Lao et al.
Nature protocols, 2(5), 1263-1268 (2007-06-05)
This protocol presents a new method to purify plasmid DNA using temperature-triggered precipitation. The principle is based on the specific DNA-binding affinity of a bacterial metalloregulatory (MerR) protein to its cognate DNA sequence and the temperature responsiveness of elastin-like protein
Jugal P Dhandhukia et al.
Theranostics, 7(16), 3856-3872 (2017-11-08)
Recombinant Elastin-Like Polypeptides (ELPs) serve as attractive scaffolds for nanoformulations because they can be charge-neutral, water soluble, high molecular weight, monodisperse, biodegradable, and decorated with functional proteins. We recently reported that fusion of the FK-506 binding protein 12 (FKBP) to
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