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69454 Sigma-Aldrich

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.

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Properties

Quality Level   100
mfr. no.   Novagen®
storage condition   OK to freeze
  avoid repeated freeze/thaw cycles
storage conditions   = -70C
cell transformation   transformation efficiency: >5×106 cfu/μg

Description

General description

Genotype: F-recA1 hsdR(rK12- mK12+) (DE3) pLysS (CamR, Rif R)





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.

HMS174 strains provide the recA mutation in aK-12 background. Like BLR, these strains maystabilize certain target genes whose productsmay cause the loss of the DE3 prophage.

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.

HMS174 strains provide high transformation efficiencies and the recA mutation in a K-12 background. T7 lysozyme expression suppresses basal T7 expression.

Packaging

0.4 ml in Plastic ampoule

1 ml in Glass bottle

Components

0.4 ml1 mlComponent

•2 × 0.2 ml5 × 0.2 mlHMS174(DE3)pLysS Competent Cells

•2 × 2 ml4 × 2 mlSOC Medium

•2 ng2 ngTest Plasmid

Warning

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

Legal Information

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

Safety & Documentation

Safety Information

WGK Germany 
WGK 2
Protocols & Articles
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