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NovaBlue(DE3) Competent Cells - Novagen

NovaBlue is a K-12 strain ideally suited as an initial cloning host due to its high transformation efficiency, DE3 lysogen cannot be used for the blue/white screening of recombinant plasmids

Quality Level



storage condition

OK to freeze
avoid repeated freeze/thaw cycles

cell transformation

transformation efficiency: >1×108 cfu/μg

storage temp.


General description

NovaBlue(DE3) Competent Cells is a K-12 strain with high transformation efficiency and recA endA mutations. The DE3 lysogen of NovaBlue is potentially useful as a stringent host due to the presence of the lacIq repressor encoded by the F episome.

This product is covered under license from Brookhaven National Labs. Commercial entities need to obtain a research use license prior to purchase. Please contact your licensing department to confirm that your company already holds a research use license.
NovaBlue is a K-12 strain ideally suited as an initial cloning host due to its high transformation efficiency, blue/white screening capability (with appropriate plasmids) and recA endA mutations.
This product contains genetically modified organisms (GMO). Within the EU GMOs are regulated by Directives 2001/18/EC and 2009/41/EC of the European Parliament and of the Council and their national implementation in the member States respectively. This legislation obliges us to request certain information about you and the establishment where the GMOs are being handled. Click here for Enduser Declaration (EUD) Form.


1 ml in Glass bottle
0.4 ml in Plastic ampoule


0.4 ml1 mlComponent

•2 × 0.2 ml5 × 0.2 mlNovaBlue(DE3) Competent Cells

•2 × 2 ml4 × 2 mlSOC Medium

•2 ng2 ngTest Plasmid


Toxicity: Multiple Toxicity Values, refer to MSDS (O)

Legal Information

NOVAGEN is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

10 - Combustible liquids



Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

ISHL Indicated Name

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ISHL Notified Names

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Certificate of Analysis

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Certificate of Quality

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