69053

BLR(DE3) Competent Cells - Novagen

Escherichia coli, rod shaped

• Synonym(s): Competent cells for cloning
• UNSPSC Code: 41106202
• NACRES: NA.81
• Biological source: Escherichia coli
• Growth mode: adherent or suspension
• Morphology: rod shaped
• Manufacturer/tradename: Novagen^®

Properties

• Product Name: 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.
• biological source: Escherichia coli
• Quality Segment: 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

Description

General description

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.

Genotype: F^-ompT hsdS_B(r_B^- m_B^-) gal lac ile dcm Δ(srl-recA)i306::Tn10 (tet^R)(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.

Other Notes

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

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

0.4 ml1 mlComponent

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

•2 × 2 ml4 × 2 mlSOC Medium

•2 ng2 ngTest Plasmid

Legal Information

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

Disclaimer

This product is sold for internal research use only. Any commercial use of this product, its components, and/or any derivatives thereof (including but not limited to proteins produced using the product or its components) (together and hereinafter the “EMD Product”) requires signature of a written commercial use agreement with EMD Millipore Corporation or its successor-in-interest. Commercial use shall include but not be limited to: (1) use of the EMD Product to manufacture products for sale to third parties; (2) use of the EMD Product to provide services, information, or data to third parties in exchange for consideration; (3) use of the EMD Product for therapeutic, diagnostic or prophylactic purposes (including as part of a device, chip, assay or other product); or (4) resale of the EMD Product, whether or not such EMD Product is resold for research use. Nothing contained herein shall be deemed to represent or warrant that additional third party rights are not required for use of the EMD Product. Please direct any questions on these use restrictions to: licensing@milliporesigma.com.

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

Safety Information

• Storage Class: 10 - Combustible liquids
• wgk: WGK 2