69041

B834(DE3) Competent Cells - Novagen

Escherichia coli, rod shaped

• Synonyme(s) : Competent cells
• Code UNSPSC : 41106202
• Nomenclature NACRES : NA.81

Propriétés

• Product Name: B834(DE3) Competent Cells - Novagen, B834 is the parental strain for BL21. These hosts are methionine auxotrophs and allow high specific activity labeling of target proteins with 35S-methionine and selenomethionine for crystallography.
• Source biologique: Escherichia coli
• Fabricant/nom de marque: Novagen^®
• Conditions de stockage: OK to freeze; avoid repeated freeze/thaw cycles
• Mode de croissance: adherent or suspension
• Morphologie: rod shaped
• Technique(s): microbiological culture: suitable
• Transformation cellulaire: transformation efficiency: >2×10⁶ cfu/μg
• Conditions d'expédition: dry ice
• Température de stockage: −70°C

Description

Description générale

B834 is the parental strain for BL21 (1). These protease-deficient hosts are methionine auxotrophs and allow high specific-activity labeling of target proteins with ³⁵S-methionine and selenomethionine for crystallography (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 dcm met (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.

B834 is the parental strain for BL21. These hosts are methionine auxotrophs and allow high specific activity labeling of target proteins with 35S-methionine and selenomethionine for crystallography.

Composants

0.4 ml1 mlComponent

•2 × 0.2 ml5 × 0.2 mlB834(DE3)Competent Cells

•2 × 2 ml4 × 2 mlSOC Medium

•2 ng2 ngTest Plasmid

Avertissement

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

Autres remarques

1. Wood, W. B. (1966) J. Mol. Biol. 16, 118–133.

2. Leahy, D. J., Hendrickson, W. A., Aukhil, I., and Erickson, H. P. (1992) Science 258, 987–991.

Informations légales

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

Informations sur la sécurité

• Code de la classe de stockage: 10 - Combustible liquids
• Classe de danger pour l'eau (WGK): WGK 2