Each reaction tube contains 50 ul of competent cells. This product is available as a set of 11 or 22 tubes or reactions.
70236-M
BL21(DE3)pLysS Singles Competent Cells - Novagen
Escherichia coli, rod shaped
Synonyme(s) :
BL21(DE3) competent cells, Competent bacterial cells
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11 REACTIONS
217.00 CHF
217.00 CHF
Date d'expédition estimée le22 mai 2025
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11 REACTIONS
217.00 CHF
About This Item
Code UNSPSC :
41106202
Nomenclature NACRES :
NA.54
217.00 CHF
Date d'expédition estimée le22 mai 2025
Produits recommandés
Nom du produit
BL21(DE3)pLysS Singles Competent Cells - Novagen,
Source biologique
Escherichia coli
Niveau de qualité
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: >2×107 cfu/μg
Conditions d'expédition
dry ice
Température de stockage
−70°C
Description générale
BL21 strains are the most widely used hosts for protein expression from pET recombinants and have the advantage of being deficient in both lon and ompT proteases.
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.
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) pLysS (CamR)
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.
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.
Composants
•11 or 22Singles Competent Cells•2 or 4 × 2 mlSOC Medium•10 µlTest Plasmid
Avertissement
Toxicity: Multiple Toxicity Values, refer to MSDS (O)
Informations légales
NOVAGEN is a registered trademark of Merck KGaA, Darmstadt, Germany
Code de la classe de stockage
10 - Combustible liquids
Classe de danger pour l'eau (WGK)
WGK 2
Certificats d'analyse (COA)
Recherchez un Certificats d'analyse (COA) en saisissant le numéro de lot du produit. Les numéros de lot figurent sur l'étiquette du produit après les mots "Lot" ou "Batch".
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How many µL are in each tube of the singles?
1 answer-
Helpful?
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What is the difference between the strain expressing pLysE and pLysS?
1 answer-
Products 69451-M and 70236-M are exactly the same competent cells. The only difference is in the packaging. The 70236 is already in 50uL aliquots, which are single-use, each aliquot is used for one reaction. This reference is available in two sizes of 11 or 22 reactions. While product 69451 is available in single 0.4 or 1mL volumes which may be thawed once and dispensed to smaller aliquots.
The difference between the 69451-M/70236-M products and the CMC0015 BL21 is the type of plasmid that they express for the T7 lysozymes. The expression of T7 lysozyme reduces the basal expression of the target genes, inhibiting the T7 RNA polymerase. Specifically, with the expression of the plasmid pLysE (Ref. CMC0015) a higher expression of the levels of T7 Lysozime is obtained in comparison with the plasmid pLysS (ref. 69451-M/70236-M). Consequently, with reference CMC0015 there is even less risk of basal expression of the target protein in the absence of IPTG stimulation. This could be particularly relevant for toxic proteins that could affect competent cell viability.Helpful?
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