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Plasmid Purification

The purification of plasmid DNA from bacterial cells is an important step in the cloning workflow.  During plasmid purification, bacterial cells are lysed, freeing DNA and other cellular components from the cell wall. Cellular components are then removed, and the DNA-containing lysate is processed to further remove contaminants separate the plasmid DNA from the genomic DNA.

The Monarch Plasmid Miniprep Kit is a rapid and reliable method for the purification of high quality plasmid DNA from bacterial cultures. This method employs standard cell resuspension, alkaline lysis, and neutralization steps, with the additional benefit of color indicators at certain steps to easily monitor completion. Unique wash buffers ensure that salts, proteins, RNA and other cellular components are removed, allowing for the elution of concentrated, highly pure DNA. Elution in as little as 30 µl provides concentrated DNA for use in downstream applications, such as restriction enzyme digestion, DNA sequencing, PCR, other enzymatic manipulations and transfection of robust cell lines. To learn more, view performance data for the Monarch Plasmid Miniprep Kit.


Monarch Plasmid Miniprep Kits provide fast and reliable purification, reduced hands-on time and elution in low volumes.

Our unique column design offers several improvements over other commercially available products, including the elimination of buffer retention, and elution in as little as 30 µl.

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FAQs for Plasmid Purification
Protocols for Plasmid Purification
Application Notes for Plasmid Purification
Advantages of the Monarch Plasmid Miniprep Kit
Advantages of the Monarch Plasmid Miniprep Kit
  • Elute in as little as 30 ╬╝l
  • Prevent buffer retention and salt carry-over with optimized column design
  • Reduce hands on time with faster protocols and less spin time
  • Monitor completion of certain steps using colored buffer system
  • No need to add RNase before starting
  • Easily label columns using tab and frosted surfaces
  • Buffers and columns available separately
  • Significantly less plastic used when compared with other kits
  • Responsibly-sourced and recyclable packaging
  • No hazardous materials fees
Specifications of the Monarch Plasmid Miniprep Kit
  • Culture Volume: 1-5 ml, not to exceed 15 OD units.
  • Binding Capacity: up to 20 μg
  • Plasmid Size: up to 25 kb
  • Typical Recovery: up to 20 μg. Yield depends on plasmid copy number, host strain, culture volume, and growth conditions.
  • Elution Volume: ≥ 30 μl
  • Purity: A260/280 and A260/230 ≥ 1.8
  • Protocol Time: 10.5 minutes of spin and incubation time
  • Compatible Downstream Applications: restriction digestion and other enzymatic manipulations, transformation, transfection of robust cells, DNA sequencing, PCR, labeling, cell-free protein synthesis, etc.
Legal Information

Products and content are covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB). The use of trademark symbols does not necessarily indicate that the name is trademarked in the country where it is being read; it indicates where the content was originally developed. The use of this product may require the buyer to obtain additional third-party intellectual property rights for certain applications. For more information, please email

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.

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