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DNA Effects on Transformation Efficiency and Colony Output: The optimal amount of DNA to use in a transformation reaction is lower than commonly recognized. Using clean, supercoiled pUC19, the efficiency of transformation is highest in the 100 pg-1 ng range. However, the total colonies which can be obtained from a single transformation reaction increase up to about 100 ng.Effect of heat shock time on NEB 5-alpha competent E.coli transformation efficiency: 50 μl of competent cells were transformed with 100 pg of pUC19 control DNA following the provided High Efficiency Transformation Protocol except heat shock time varied from 0 to 80 seconds.Effect of DNA incubation time on NEB 5-alpha competent E.coli transformation efficiency: 50 μl of competent cells were transformed with 100 pg of pUC19 control DNA following the provided High Efficiency Transformation Protocol except DNA incubation time varied from 0 to 40 minutes.Effect of outgrowth medium on transformation efficiency: 50 μl of NEB 5-alpha competent E.coli was transformed with 100 pg of pUC19 control DNA following the provided High Efficiency Transformation Protocol with the exception of varying the outgrowth medium. NEB SOC outgrowth medium delivers the highest transformation efficiency.Benefit from the high transformation efficiencies of NEB 5-alpha: The transformation efficiencies of NEB 5-alpha and DH5α were compared using each manufacturers' recommended protocols. Values shown are the average of triplicate experiments.
For C2987H, C2987I, C2987P and C2987U, SOC Outgrowth Medium is provided. For C2987R, Outgrowth Medium 1.5 is provided.
CAUTION: This product contains DMSO, a hazardous material. Review the MSDS before handling.
STORAGE AND HANDLING: Competent cells should be stored at -80°C. Storage at -20°C will result in a significant decrease in transformation efficiency. Cells lose efficiency whenever they are warmed above -80°C, even if they do not thaw.
SOC medium can be stored at either 4°C or Room Temperature depending on how fast it will be used. Storing at Room Temperature is convenient and adequate for short term usage (weeks to a couple of months). For long term storage, we recommend storing at 4°C. Please note that Outgrowth Medium 1.5 supplied with C2987R (1 x 384 well plate format) must only be stored at Room Temperature or crystals will form.
The Product Summary Sheet, or Data Card, includes details for how to use the product, as well as details of its formulation and quality controls. The following file naming structure is used to name the majority of these document files: [Catalog Number]Datasheet-Lot[Lot Number]. For those product lots not listed below, please contact NEB at [email protected] or fill out the Technical Support Form for appropriate document.)
Kostylev M., Otwell A.E., Richardson R., Suzuki Y. (2015) Cloning Should Be Simple: Escherichia coli DH5α-Mediated Assembly of Multiple DNA Fragments with Short End Homologies PLoS One; 10, e0137466. PubMedID: PMC4562628, DOI: 10.1371/journal.pone.0137466
Lee S.B., Park S.K., Kim Y.S. (2015) Production of bioactive chicken (Gallus gallus) follistatin-type proteins in E. coli Sci Rep; 5, 11603. PubMedID: 26302688, DOI: 10.1038/srep11603
Mascher G, Derman Y, Kirk DG, Palonen E, Lindström M, Korkeala H (2014) The CLO3403/CLO3404 Two-Component System of Clostridium botulinum E1 Beluga Is Important for Cold Shock Response and Growth at Low Temperatures Appl Environ Microbiol; 80(1), 399-407. PubMedID: 24185852, DOI: 10.1128/AEM.03204-13
Quality Control tests are performed on each new lot of NEB product to meet the specifications designated for it. Specifications and individual lot data from the tests that are performed for this particular product can be found and downloaded on the Product Specification Sheet, Certificate of Analysis, data card or product manual. Further information regarding NEB product quality can be found here.
The Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]
The Certificate of Analysis (COA) is a signed document that includes the storage temperature, expiration date and quality controls for an individual lot. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]_[Lot Number]
The Product Summary Sheet, or Data Card, includes details for how to use the product, as well as details of its formulation and quality controls. The following file naming structure is used to name the majority of these document files: [Catalog Number]Datasheet-Lot[Lot Number]. For those product lots not listed below, please contact NEB at [email protected] or fill out the Technical Support Form for appropriate document.)
This product is covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB).
While NEB develops and validates its products for various applications, the use of this product may require the buyer to obtain additional third party intellectual property rights for certain applications.
For more information about commercial rights, please contact NEB's Global Business Development team at [email protected].
This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.
New England Biolabs (NEB) is committed to practicing ethical science – we believe it is our job as researchers to ask the important questions that when answered will help preserve our quality of life and the world that we live in. However, this research should always be done in safe and ethical manner. Learn more.
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