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Invitrogen™ MAX Efficiency™ Stbl2™ Competent Cells

High-efficiency chemically competent cells specifically designed for cloning unstable inserts

Manufacturer:  Invitrogen™ 10268019


Catalog No. 10-268-019

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Includes: MAX Efficiency Stbl2 Competent Cells: 5 vials, 200μL each (total of 1mL), pUC19 DNA (0.01μg/mL): 1 vial, 100μL, SOC Medium: 1 bottle, 6mL



In addition to recA1, a unique set of genetic markers allow for stable cloning of direct repeat and retroviral sequences and tandem array genes.

  • 1 x 109 transformants/μg plasmid DNA for cloning rare sequences
  • Elimination of mcrBC-hsdRMS-mrr and mutation of mcrA—allows cloning of methylated genomic sequences
  • Unique genotype that stabilizes direct repeat and retroviral sequences such as SIV and HIV
  • Greatly increased plasmid yield and quality due to endA1 mutation

Not High Throughput-Compatible (Manual)

Cloning, Transformation

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Shipping Condition: Dry Ice



Competent Cell
High Efficiency (>10^9 cfu/µg)
High Efficiency (> 10^9 cfu⁄µg)
Suitable for cloning unstable DNA
May be used for plasmids > 20 kb
Not for ccdB vector propagation
Dry Ice
E. coli
MAX Efficiency™, Stbl2™
Lacks F' Episome
Chemically Competent
• MAX Efficiency™ Stbl2™ Competent Cells: 5 vials, 200 µl each (total of 1 ml)
• pUC19 DNA (0.01 µg/ml): 1 vial, 100 µl
• SOC Medium: 1 bottle, 6 ml

Store Competent Cells at -80°C. Store pUC19 DNA at -20°C. Store SOC Medium at 4°C or at room temperature.
Not High-throughput Compatible (Manual)
Not Suitable for preparing unmethylated DNA
5 x 200 μL
Product Certifications


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