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70956  Rosetta™(DE3)pLysS Competent Cells

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18 April 2014

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Product number Qty/Pk Quantity Price Available to Ship
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70956-3  0.4 ml 
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70956-4  1 ml 
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Rosetta™ host strains are BL21 derivatives designed to enhance the expression of eukaryotic proteins that contain codons rarely used in E. coli. These strains supply tRNAs for AGG, AGA, AUA, CUA, CCC, GGA codons on a compatible chloramphenicol-resistant plasmid. Thus the Rosetta strains provide for “universal” translation which is otherwise limited by the codon usage of E. coli. The tRNA genes are driven by their native promoters. In Rosetta(DE3)pLysS, the rare tRNA genes are present on the same plasmids that carries the T7 lysozyme gene.

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.

pLysS strains express T7 lysozyme, which further suppresses basal expression of T7 RNA polymerase prior to induction, thus stabilizing pET recombinants encoding target proteins that affect cell growth and viability. Genotype: F- ompT hsdSB(rB- mB-) gal dcm (DE3) pLysSRARE (CamR)
Product information
Components
0.4 ml1 mlComponent
2 × 0.2 ml5 × 0.2 mlRosetta(DE3)pLysS Competent Cells
2 × 2 ml4 × 2 mlSOC Medium
2 ng2 ngTest Plasmid
Store and ship information

Hazardous Materials Attention: Due to the nature of the Hazardous Materials in this shipment, additional shipping chargesmay be applied to your order. Certain sizes may be exempt from the additional hazardous materials shipping charges. Please contact your local sales office for more information regarding these charges.

Storage ≤ -70°C
Ship Dry Ice Only
Multiple Toxicity Values, refer to MSDS
Licence Brookhaven This product is covered under license from Brookhaven National Labs. Commercial entities need to obtain a research use license prior to purchase. Please contact your licensing department to confirm that your company already holds a research use license.

© Merck KGaA, Darmstadt, Germany, 2014

All references to Merck refer to Merck KGaA, Darmstadt, Germany.


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