Invitrogen™

One Shot™ BL21(DE3)pLysS Chemically Competent E. coli

Catalog number: C606010
Invitrogen™

One Shot™ BL21(DE3)pLysS Chemically Competent E. coli

Catalog number: C606010
Catalog Number
C606010
also known as C6060-10
Unit Size
11 x 50 µL/tube
Price (USD)
Price: 253.00
Online price: 245.65
Your price:
Availability
-
Quantity
Catalog Number
C606003
also known as C6060-03
Unit Size
21 x 50 µL/tube
Price (USD)
Price: 419.00
Online price: 401.65
Your price:
Availability
-
Quantity
Catalog NumberUnit SizePrice (USD)AvailabilityQuantity
C606010
also known as C6060-10
11 x 50 µL/tube
Price: 253.00
Online price: 245.65
Your price:
-
C606003
also known as C6060-03
21 x 50 µL/tube
Price: 419.00
Online price: 401.65
Your price:
-
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One Shot BL21(DE3)pLysS Chemically Competent E. coli cells are ideal for use with bacteriophage T7 promoter-based expression systems such as pRSET and pET. The pLysS plasmid carried by the BL21(DE3) pLysS strain produces T7 lysozyme, an inhibitor of T7 RNA polymerase, to reduce basal level expression of the gene of interest. pLysS confers resistance to chloramphenicol (CamR) and contains the p15A origin. This origin allows pLysS to be compatible with plasmids containing the ColE1 or pMB1 origin (i.e. pUC- or pBR322- derived plasmids). Recombinant proteins that are nontoxic to E. coli are generally expressed at higher levels in BL21(DE3) cells compared to the BL21(DE3) pLysS strain with tighter expression control. BL21(DE3)pLysS is recommended for use when expressing toxic genes.

The BL21 (DE3) E. coli strain is one of the most popular host strains to produce recombinant proteins. This strain had been engineered to carry the λDE3 lysogen that contains T7 RNA polymerase gene under control of the lacUV5 promoter. IPTG is required to induce expression of the T7 RNA polymerase cascade system that in turn transcribe T7 promoter regulated target gene.

BL21(DE3) is a derivative from the E. coli B strain that does not contain the ion protease and is also deficient in the outer membrane protease OmpT. The lack of two key proteases reduces degradation of heterologous proteins expressed in the strains. Additionally, several other strain features make them especially suited for protein production, namely fast growth in minimal medium, a lower acetate production when grown in high glucose media, and an ability to reach high cell density. One Shot BL21(DE3)pLysS Chemically Competent E. coli cells can achieve transformation efficiency of >1 x 108 cfu/μg of control DNA.

One Shot BL21(DE3)pLysS Chemically Competent E. coli cells offer:
• Transformation efficiency of >1 x 108 cfu/μg control plasmid DNA
• Ion and OmpT protease deficiency that reduces degradation of recombinant protein
• IPTG-inducible lacUV5 promoter that controls expression of the T7 RNA polymerase
• pLysS (CamR) plasmid for reduced basal expression in uninduced cells
hsdS mutation that allows efficient transformation of unmethylated DNA
• Fast growth in minimal medium and ability to reach high cell density

Easy-to-use One Shot format
BL21(DE3)pLysS Chemically Competent E. coli cells are supplied in the convenient, single-reaction One Shot format. The single-tube, single-use format allows all steps of the transformation protocol, up to plating, to take place in the same tube, thereby helping save time and to prevent contamination.

Genotype
FompT hsdSB (rB–, mB–) gal dcm (DE3) pLysS(CamR) 

Find the strain and format that you need
We offer other E. coli strains for protein expression.
For expression of toxic proteins, consider BL21 AI One Shot Chemically Competent E. coli.
BL21 Star (DE3) and other strains are available in MultiShot formats for high throughput applications.
Explore bacterial growth media formats.
We offer a variety of systems for the expression of recombinant proteins in E. coli. The Champion pET expression system provides the highest level of protein production available in any expression system.

For Research Use Only. Not for use in diagnostic procedures.

Specifications

Product Type
Chemically Competent Cells
Contains F' Episome
No
Improves Plasmid Quality
No
Cloning Methylated DNA
No
Transformation Efficiency Level
Medium Efficiency (1 x 108 to 1 x 109 cfu/μg)
Antibiotic Resistance Bacterial
Yes (Chloramphenicol)
Blue/White Screening
No
High-throughput Compatibility
Low
Preparing Unmethylated DNA
Yes (dcm)
Reduces Recombination
No
Shipping Condition
Dry Ice
T1 Phage - Resistant (tonA)
No
Species
E. coli (B)
Promoter
T7
Format
Tube
Product Line
One Shot™
Quantity
11 x 50 μL
Toxic Proteins
No
Improves RNA Stability
Yes (pLysS)
Improves Protein Stability
Yes (lon, ompT)

Contents & Storage

• Chemically Competent cells (11 x 50 μL); store at –80°C
• pUC19 Control DNA (1 x 50 μL); store at –80°C
• S.O.C. Medium (6 mL); store at 4°C or room temperature

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