Transformation Kits & Competetent Cells

<h2 data-section-id="k59sk3" data-start="0" data-end="52">What are transformation kits and competent cells?</h2>
&nbsp;
Transformation kits and competent cells consist of E. coli strains prepared to take up exogenous plasmid DNA, either through chemical competence (calcium chloride treatment, transformed via heat shock) or electrocompetence (transformed via electroporation), along with associated transformation buffers and protocols. Related entities include transformation efficiency (transformants per microgram), heat-shock and electroporation methods, strain genotype (recA, endA deficiency for plasmid stability), and downstream plasmid recovery for sequencing or transfection.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li>Mix &amp; Go! Transformation Kits, rapid protocols for preparation of competent E. coli in&nbsp;</li>
<li>ProClone&trade; Competent Cells with optimized E. coli strains for cloning and library generation.</li>
<li>Specialized Competent E. coli Strains ready-made JM109, DH5 Alpha, and Zymo 10B cells for regular and complex assembly.</li>
<li>Autolysis Competent Cells: designed for simplified cell lysis and streamlined protein expression using XJa and XJb strains</li>
<li>Frozen-EZ Yeast Transformation Kits for genetic manipulation of yeast strains.</li>
</ul>
&nbsp;
<h2 data-section-id="1ld88i5" data-start="812" data-end="876">How to choose transformation kits and competent cell products</h2>
&nbsp;
Chemically competent vs. electrocompetent cells
Chemically competent cells use a heat-shock protocol and are generally easier to handle for routine cloning, while electrocompetent cells require an electroporator but can achieve higher transformation efficiency for large plasmids, low-copy constructs, or DNA with modifications that reduce chemical transformation efficiency.
General cloning strains vs. protein expression strains
General cloning strains are selected for high transformation efficiency and genetic features (such as recA and endA deficiency) that improve plasmid stability and quality for downstream sequencing, while protein expression strains carry features supporting recombinant protein production, such as T7 RNA polymerase expression for IPTG-inducible systems; using a cloning strain for protein expression (or vice versa) generally gives suboptimal results.
Transformation efficiency requirements
Routine cloning of standard-sized plasmids works well with competent cells rated at 10^6&ndash;10^8 transformants per microgram, while ligation reactions with very low DNA concentrations (such as multi-fragment seamless assembly products) may benefit from higher-efficiency cells rated above 10^8 transformants per microgram.
Transformation kits may include a positive control plasmid and competent cells for validating transformation efficiency before using precious experimental DNA; this is particularly useful when troubleshooting low transformation yields to distinguish competent cell quality issues from ligation or assembly reaction issues.
&nbsp;
<h2 data-section-id="1fljvas" data-start="3947" data-end="3972">Specifications context</h2>
&nbsp;
Competent cell transformation efficiency is reported in transformants per microgram of standard control plasmid DNA, with general cloning strains commonly rated at 10^6&ndash;10^8 and high-efficiency formulations exceeding 10^8 transformants per microgram. Cells are typically supplied as frozen aliquots (e.g., 50&ndash;100 microliters per tube) for single-use transformations, shipped on dry ice and stored at -80&deg;C, with repeated freeze-thaw substantially reducing efficiency.&nbsp;
This sub-category is part of MBP's cloning catalog alongside ligation independent cloning kits and chemicals/reagents, the upstream steps of a cloning workflow. Labs producing custom lentivirus for immortalization can also review MBP's cell immortalization catalog. MBP's specialist team can help confirm strain genotype and transformation efficiency requirements for a specific cloning or expression project before order placement.
<a href="https://mbpinc.net/contact-us">Contact the expert team</a> at MBP today and get high-quality transformation kits and competent cells for your lab.

MSDS

Protocol

Frozen-EZ Yeast Transformation II™ Kit (120 Rxns.)

The Frozen-EZ Yeast Transformation II&trade; Kit (T2001) by Zymo Research delivers 105&ndash;106 transformants/&micro;g plasmid DNA across four yeast species in under 15 minutes of hands-on preparation and without a spheroplast step. The 120-reaction kit stores at 0&ndash;4&deg;C; prepared competent cells remain stable for &ge;1 year at &le;&minus;70&deg;C.
Compatible species: Saccharomyces cerevisiae, Candida albicans, Schizosaccharomyces pombe, and Pichia pastoris. No carrier DNA required.
MBP is a registered vendor for Howard Hughes Medical Institute, Vanderbilt University, MD Anderson Cancer Center, Eurofins, and many other institutes across the USA. Order via <a href="https://www.mbpinc.net/quickorder">Quick Order</a> or contact <a href="mailto:customerservice@mbpinc.net">customerservice@mbpinc.net</a>.

Competent Cell Stability

Processing Time

Product Storage

Transformation DNA Input

Transformation Efficiency

Manufacturer

Shipping Condition

Storage Condition

DataSheet

Mix & Go! Competent Cells - DH5 Alpha

Mix &amp; Go! Competent Cells - DH5 Alpha by Zymo Research — 108–109 transformants/µg pUC19, no heat shock, approximately 20-second transformation. Store at &lt;−70°C; integrity guaranteed 6 months. Available as T3007 (10×100 µl), T3009 (96×50 µl, 12×8-Tube Strips), and T3010 (96×50 µl with PCR plates and Cover Foils).

Additional Info

Genotype

Mix & Go! Competent Cells - DH5 Alpha (10 x 100 µl)

Mix & Go! Competent Cells - DH5 Alpha (96 x 50 µl)

Mix & Go! Competent Cells - DH5 Alpha (96 x 50 µl) w/ 96-well PCR plates and Cover Foils

Mix & Go! Competent Cells - HB101

Mix &amp; Go! Competent Cells - HB101 (T3011 / T3013) by Zymo Research are premade chemically competent E. coli HB101 cells with 10⁸–10⁹ transformants/µg efficiency and a 20-second protocol. Available in 10 × 100 µl (T3011) or 96 × 50 µl (T3013) formats; Dam⁺/Dcm⁺, recA⁻, max 10 kb plasmid, stored at −70°C to −80°C. MBP is a registered vendor for Howard Hughes Medical Institute, Vanderbilt University, MD Anderson Cancer Center, and many more leading research institutes, serving labs across the United States, Canada, and internationally.

Mix & Go! Competent Cells - HB101 (10 x 100 µl)

Mix & Go! Competent Cells - HB101 (96 x 50 µl)

Mix & Go! Competent Cells - JM109

T3003 by Zymo Research is the Mix &amp; Go! Competent Cells - JM109, chemically competent E. coli cells for plasmid transformation without heat shock. Transformation complete in 20 seconds; efficiency 10⁸–10⁹ transformants/µg (pUC19). Supplied as 10 × 100 µl tubes; supports blue-white screening and plasmids up to 10 kb. Store at -70°C to -80°C.

Mix & Go! Competent Cells - JM109 (10 x 100 µl)

Mix & Go! Competent Cells - JM109 (96 x 50 µl)

Mix & Go! Competent Cells - TG1 (10 x 100 µl)

Mix &amp; Go! Competent Cells TG1 T3017 by Zymo Research are ready-to-use chemically competent E. coli cells (10 × 100 µL) with 10⁸–10⁹ transformants/µg, requiring no heat shock. TG1 strain supports blue-white screening (lacZ M15) and plasmids up to 10 kb. Storage at –70°C to –80°C.

Mix & Go! Competent Cells - XJa Autolysis (10 x 100 µl)

Mix &amp; Go! Competent Cells — XJa Autolysis (T3021) by Zymo Research. 10 × 100 µl. Transformation efficiency 108–109 cfu/µg. Built-in autolysis: 80–90% cell lysis in 10 min. No heat shock required.

Autolysis

DNA Extraction

DNA Stability

Protein Expression

Mix & Go! Competent Cells - XJa(DE3) Autolysis (10 x 100 µl)

T3031 Mix &amp; Go! Competent Cells — XJa(DE3) Autolysis by Zymo Research provides 10 × 100 µl aliquots of E. coli with 10⁸–9⁹ CFU/µg transformation efficiency and L-Arabinose-triggered λ endolysin autolysis for simplified protein expression and purification. Includes 1 ml 500× L-Arabinose; stored at -70°C to -80°C. MBP is a registered vendor for Howard Hughes Medical Institute, Vanderbilt University, MD Anderson Cancer Center, and many more leading research institutes, serving labs across the United States, Canada, and internationally.

Mix & Go! Competent Cells - XJb Autolysis (10 x 100 µl)

T3041 by Zymo Research is the Mix &amp; Go! XJb Autolysis Competent Cells — an E. coli expression strain achieving 108–109 transformants/µg and 80–90% autolytic lysis within 10 minutes via L-Arabinose induction. Lon-/OmpT- for improved protein yields. Supplied as 10 × 100 µl with 1 ml 500× L-Arabinose. Store at -70°C to -80°C.

Cell Growth

Mix & Go! Competent Cells - XJb(DE3) Autolysis (10 x 100 µl)

Mix &amp; Go! Competent Cells - XJb(DE3) Autolysis (T3051) by Zymo Research — 10 × 100 µl. 108–109 transformants/µg; no heat shock. L-arabinose-induced autolysis: 80–90% cell lysis in ~10 min by freeze-thaw. DE3 lysogen for T7 expression. Lon-/OmpT- protease-deficient. Includes 500× L-arabinose. Storage −70°C to −80°C.

Mix & Go! Competent Cells - Zymo 10B

Mix &amp; Go! Competent Cells - Zymo 10B by Zymo Research — &gt;108 transformants/µg pUC19 without heat shock. Available as T3019 (10 × 100 µl) or T3020 (96 × 50 µl, 12 × 8-Tube Strips). Storage &lt;−70°C; 6-month integrity guarantee. Genotype: F- mcrA Δ(mrr-hsdRMS-mcrBC) Φ80lacZΔM15 ΔlacX74 recA1 endA1 araD139 Δ(ara leu) 7697 galU galK rpsL nupG λ-.

Mix & Go! Competent Cells - Zymo 10B (10 x 100 µl)

Mix & Go! Competent Cells - Zymo 10B (96 x 50 µl)

Mix & Go! E. coli Transformation Kit (up to 20 ml)

Mix &amp; Go! E. coli Transformation Kit T3001 by Zymo Research enables preparation of up to 20 mL of competent cells with 10⁸–10⁹ transformants/µg pUC19 and no heat shock required. Compatible with DH5α, BL21, JM109, TG1, and XL10 Gold. Competent cell preparation completes in ~1–2 hours.