Thermo Fisher, C739601, MultiShot™ StripWell Stbl3™ Competent Cells

MultiShot™ StripWell Stbl3™ Competent Cells MultiShot StripWell Stbl3 Chemically CompetentE. colicells are cloning competent cells designed for cloning direct repeats found in lentiviral expression vectors. Stbl3 cells reduce the frequency of homologous recombination and are pre-aliquoted in a rack containing 12 strips of 8 wells to increase productivity for throughput bacterial transformations.
Achieve remarkable stability of lentiviral vectors in Stbl3 cellsMultiShot StripWell Stbl3 Competent Cells reduce the frequency of homologous recombination of direct repeats found in lentiviral vectors (e.
g., ViraPower Lentiviral Expression kits) and other retroviral vectors (e.
g., instability-prone HIV-based plasmids). The Stbl3 strain has been used in many applications, including genome editing CRISPR workflows, vaccine development, and cloning and maintaining vectors with multiple repeats (e.
g., gene coding protein with repeated sequence). The transformation efficiency of MultiShot StripWell Stbl3 chemically competentE. colicells is >1 x 107cfu/μg plasmid DNA.
The Stbl3E. colistrain is derived from the HB101 strain (with a hybrid K-12 and B strain genome). Though the Stbl3 strain contains therecA13 allele of therecA mutation that reduces nonspecific recombination occurrence in cloned DNA, the ability of the Stbl3 strain to maintain unstable inserts is reportedly driven by other genetic traits. Mutations in the Stbl3 methylation-dependent restriction system (mcrB,mrr,andhsdS20) allow construction of cloning genomic DNA. This strain isendA1+, thus a nonspecific endonuclease I that digests DNA is present in the cells. Stbl3 reproducibly yields much more plasmid DNA than DH strains (e.
g., 10-fold or more plasmid DNA than the TOP10 strain) and sustainably produces high titer lentivirus.
MultiShot StripWell Stbl3 Competent Cells offer:
• Expected efficiency of >1 x 107transformants/μg plasmid DNA
• Optimal performance for the propagation of lentiviral vectors and maintenance of direct repeats
• Enhanced genomic DNA cloning capacity (mcrB,mrr,andhsdS20)
• Capability to produce high DNA yieldsNote:For optimal performance maintaining plasmids with complex repeat sequences, Stbl3 cells should be cultured at 30°C. When performing plasmid DNA isolation from Stbl3 cells with wild type endonuclease I (endA1+), ensure that buffers contain 10 mM EDTA. EDTA will inactivate the endonuclease and avoid DNA nicking and vector degradation (follow plasmid DNA purification kit instructions forendA1+E. colistrains).
MultiShot StripWell flexible formatEach StripWell of eight connected tubes is designed with the same single-tube, single-use features as our One Shot format tubes. This format allows all steps of the transformation protocol, up to plating, to take place in the same tube, thereby saving time and reducing chance of contamination. After addition of DNA, MultiShot StripWell competent cells can be transformed by heat-shock at 42°C using a water bath, all in the same tube.
The StripWell tubes can be cut to permit transformations in a single tube, eliminating wasted aliquots and avoiding freeze-thaws cycles that can result in reduced transformation efficiency.
Benefits of the MultiShot StripWell format include:
•Increased productivity—suitable for high throughput experimentation
•Maximal flexibility—transform as few as 1 tube or as many as 96 from the StripWell rack
•Familiar convenience—add DNA directly to cells, heat shock, and recover in the same tubeGenotypeF–mcrBmrr hsdS20(rB–, mB–)recA13supE44ara-14galK2lacY1proA2rpsL20(StrR)xyl-5 λ–leu mtl-1Find the strain and format that you needOtherStbl strainsare available with different genetic background.
Many otherE. colistrains and formats ofchemically competentandelectrocompetentcells are also available to meet specific transformation needs.
For high-throughput transformation, choose from our collection ofMultiShot formatted comp cellsoremail usfor custom formatting options.
We offerbacterial growthmedia in various formats.
Antibiotic Resistance Bacterial: Yes (Streptomycin)
Blue/White Screening: No
Cloning Methylated DNA: Yes (mcrB, mrr)
Cloning Unstable DNA: Yes (recA13)
Contains F' Episome: No
High-throughput Compatibility: High
Plasmid: May be used for plasmids >20 kb
Preparing Unmethylated DNA: No
Product Line: Multishot™
Product Type: Chemically Competent Cells
Quantity: 1 x 96 tube rack (50 μl/tube)
Reduces Recombination: Yes (recA13)
Shipping Condition: Dry Ice
T1 Phage - Resistant (tonA): No
Format: 8-well Strips
Species: E. coli (K12/B hybrid)
Unit Size: Each