[Product Introduction]






The magnetic bead method plasmid DNA medium extraction kit is a kind of bacterial plasmid DNA medium extraction kit recently developed by Suzhou Beike Nano Biological Technology Co., LTD. This product combines magnetic nanoseparation technology with SDS alkali lysis of bacterial cells to extract high quality plasmid DNA from recombinant E. coli cultures in a simple, fast and low-cost way. The cell fragments and SDS complex precipitate under centrifugal force. Under certain conditions, the magnetic beads can adsorb plasmid DNA in the supernatant well, and other impurities such as proteins and salt ions can be removed by washing. When conditions change, the beads release the adsorbed plasmid DNA. Up to 300 μg of plasmid DNA can be recovered from 20-40 mL Luria Broth (LB) in 45 minutes. Note that the actual yield and optimal culture volume depend on the plasmid and medium. The plasmids extracted by this kit are of high purity, and the OD260/OD280 ratio is generally between 1.7 and 1.9, and the OD260/OD230 ratio is greater than 2.0, which can be directly used for subsequent experiments such as transformation, DNA sequencing, PCR, PCAR-based mutation, in vitro transcription and enzyme digestion.














【 characteristics 】






L Over 300 μg plasmid DNA was obtained from 20-40 mL overnight culture (OD600 = 2.0);






L Compared with similar products, the extraction efficiency is higher, the purity of the obtained plasmid is higher;






L Compared with the column method, the centrifugation times can be greatly reduced, and the plasmid with better integrity can be obtained.






Multiple samples can be processed simultaneously to realize high-pass quantification and automation of plasmid extraction.














[Preservation methods and Precautions]






Please store the Beads and RNase A in the kit at 2-8℃ and the rest of the reagents at room temperature. See the packing for the expiry date.






L Freezing and centrifugation are strictly prohibited. Freezing and centrifugation may cause irreversible damage to magnetic beads.






L Magnetic beads will gather into clusters after long-term placement, thus reducing the surface area of magnetic beads and reducing the recovery rate of samples. It is necessary to thoroughly mix magnetic beads by eddy oscillation before use (usually 20 seconds of eddy oscillation).














[Kit composition]






component






Ten times






save






Resuspension solution






40 ml






2-8 ℃






Lysis buffer






40 ml






2-8 ℃






Neutralization solution






40 ml






2-8 ℃






Wash buffer






75% ethanol (for users)






2-8 ℃






Elution buffer






10 ml






2-8 ℃






bead






4 ml






2-8 ℃






RNase A






2 ml






2-8 ℃






Isopropyl alcohol






Users should bring along their own






The normal temperature










DNA concentration and purity detection :(1) the size of the obtained genomic DNA fragments was related to factors such as sample preservation time and shear force during operation. The concentration and purity of the obtained DNA fragments could be detected by agarose gel electrophoresis and ultraviolet spectrophotometer. (2) DNA should have a significant absorption peak at OD260, and OD260=1 is equivalent to about 50ng/ul double-stranded DNA and 40ng/ul single-stranded DNA. The OD260/OD280 ratio should be 1.7~1.9. If deionized water is used in elution, the ratio will be low, because pH and ions will affect the absorbance, which does not mean low purity.

Warm tip: the products supplied by Beijing Beike Xincai Technology Co., Ltd. are only used for scientific research, not for human body