HiPure Plasmid Mini Kit

HiPure Plasmid Mini Kit represents thestandard column reference model within the Magen plasmid DNA extractionportfolio. Developed for routine 1–5 mL bacterial culture workflows, it usesalkaline lysis followed by silica membrane purification to support everydayplasmid preparation for cloning, PCR, restriction digestion and standardsequencing work. The system is positioned as the core manual mini-prep formatwithin the standard plasmid branch.

Within this system, HiPure Plasmid Mini KitII (P1002) extends the workflow toward larger mini-prep culture input, while HiPure Plasmid Plus 96 Kit (P1006) converts the same standard branch into a96-well high-throughput format. Laboratories requiring low-endotoxin plasmidpreparation should move to the EF branch, with P1154, P1231 and P1156B coveringEF workflows at increasing preparation scale.

Specifications

Extraction Principle

The HiPure Plasmid procedure is based on alkaline lysis of bacterial cells followed by adsorption of DNA onto silica in the presence of high salt. The unique silica membrane used in the kit completely replaces glass or silica slurries for plasmid DNA minipreps. The procedure consists of 3 basic steps: Preparation and clearing of a bacterial lysate by alkaline method，then transfer the supernatant to column to bind DNA. After washing proteins and other impurities, nucleic acid was finally eluted with low-salt buffer (10mm Tris, pH9.0, 0.5mm EDTA).

Engineering Characteristics

Standard mini-prep membrane workflow

The kit is designed around a silica membrane mini-column format for routine 1–5mL bacterial culture processing, with protocol guidance also supportinglow-copy plasmids or cosmids when input conditions are adjusted appropriately.

Defined binding capacity for routinemini-prep use

Optional background-control wash

Technical Validation

The HiPure Plasmid Mini Kit was validated using E. coli cultures carrying common plasmid vectors, including pEGF-N1, pcDNA3.1 and pET-28b. In binding-capacity testing, plasmid yield increased with bacterial culture volume from 1 mL to 5 mL, with the column binding capacity reaching approximately 35 µg under the tested conditions.

Extraction stability was evaluated using 48 samples prepared from 2 mL overnight cultures carrying pEGF-N1. The purified plasmid DNA showed stable yield and purity across replicates, with yield variation within approximately 10%, A260/280 values of about 1.81–1.92 and A260/230 values of about 2.0–2.4.

Downstream compatibility was confirmed by restriction digestion and Sanger sequencing. Plasmid DNA purified with the HiPure Plasmid Mini Kit was successfully digested with EcoRI and HindIII, and sequencing analysis on an ABI 3730 platform produced reliable read lengths of approximately 1300 bp under the tested conditions.

Comparative testing with pcDNA3.1, pEGF-N1 and pET-28b plasmids showed plasmid recovery and purity comparable to commonly used commercial miniprep kits. In the 2 mL culture tests, purified plasmid DNA showed A260/280 values around 1.8–1.9 and clear plasmid bands by agarose gel electrophoresis, supporting routine use for cloning, restriction digestion, sequencing and other molecular biology workflows.

Kit Contents

Storage and Stability

The kit components can be stored dry at room temperature (15-25°C) and are stable for at least 18 months under these conditions. If any precipitates form in the buffers, warm at 37℃ to dissolve. After addition of RNase A，Buffer P1 is stable for 6 months when stored at 2-8°C.

Experiment Data

For guidance on selecting between standard and low-endotoxin plasmid workflows based on copy number, culture input and processing format, please refer to the Plasmid DNA Kits Purchase Guide.