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- Biomiga Express Endofree Plasmid Maxiprep, 25 Preps
- Home
- Molecular Biology
- Biomiga Express Endofree Plasmid Maxiprep, 25 Preps
Biomiga Express Endofree Plasmid Maxiprep, 25 Preps
- SKU:
- BMG-PD2568-02
- Weight:
- 10.00 LBS
- Shipping:
- Calculated at Checkout
Key to the kit is our proprietary DNA binding systems that allow the highly efficient binding of DNA to our ezBindTM matrix while proteins and other impurities are removed by Wash Buffer. Nucleic acids are easily eluted with sterile water or Elution Buffer.
Unlike other kits in the markets, no chaotropic salts are contained in the buffer of our patented plasmid purification kit.
The purified DNA is guanidine/anion exchange resin residues free.
The EZgeneTM endofree system uses a specially formulated buffer that extracts the endotoxin from the bacterial lysate. The endotoxin level is less than 0.1 EU (Endotoxin) per µg of plasmid DNA.
This kit is designed for fast and efficient purification of plasmid DNA from 100 to 200 mL of E. coli culture. The maxi column has a plasmid DNA binding capacity of 1000 µg.
The purified endofree DNA is ready for high performance of downstream applications such as transfection of robust cells such as transfection of endotoxin sensitive cell lines, primary cultured cells or microinjection.
Plasmid Copy Numbers: The yield of plasmid DNA depends on the origin of the replication and the size of the plasmid. The protocols are optimized for high copy number plasmid purification. For low copy number plasmids, both the culture volume and the buffer volume need to be scaled up 2 times.
Host Strains: The strains used for propagating plasmid have significant influence on yield. Host strains such as Top 10 and DH5a yield highquality plasmid DNA.
endA+ strains such as JM101, JM110, HB101, TG1 and their derivatives, normally have low plasmid yield due to either endogenous endonucleases or high carbohydrates released during lysis.
We recommend transform plasmid to an endA- strain if the yield is not satisfactory. For purifying plasmid DNA from endA+ strains (Table 2), we recommend use product PD1712.
Table2 endA strains of E. Coli.
EndA- Strains of E. Coli |
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DH5α |
DH1 |
DH21 |
JM106 |
JM109 |
SK2267 |
SRB |
XLO |
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TOP10 |
DH10B |
JM103 |
JM107 |
SK1590 |
MM294 |
Stbl2TM |
XL1-Blue |
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BJ5182 |
DH20 |
JM105 |
JM108 |
SK1592 |
Select96TM |
Stbl4TM |
XL10-Gold |
||||||
EndA+ Strains of E. Coli |
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C600 |
JM110 |
RR1 |
ABLE® C |
CJ236 |
KW251 |
P2392 |
BL21(DE3) |
||||||
HB101 |
TG1 |
TB1 |
ABLE® K |
DH12STM |
LE392 |
PR700 |
BL21(DE3) pLysS |
||||||
JM101 |
JM83 |
TKB1 |
HMS174 |
ES1301 |
M1061 |
Q358 |
BMH 71-18 |
||||||
All NM strains |
All Y strains |
Optimal Cell Mass (OD600 x mL of Culture): This procedure is designed for isolating plasmid grown in standard LB medium (Luria Bertani) for 12 -16 hours to a density of OD600 2.0 to 3.0. If rich mediums such as TB or 2xYT are used, make sure the cell density doesn't exceed 3.0 (OD600). A high ratio of biomass over lysis buffers result in low DNA yield and purity. The maxi column has an optimal biomass of 500-1000. For example, if the OD600 is 3.0, the optimal culture volume should be 100 to 200 mL.
Culture Volume: Use a flask or tube 4 times bigger in volume than the culture medium to secure optimal condition for bacteria growth Don't exceed the maximum culture volume suggested in the protocol. Incomplete lysis due to over amount of bacterial culture results in lower yield and less purity.
Storage and Stability
Buffer A1 should be stored at 4°C once RNase A is added and Buffer ER should be stored at 4°C. All other materials can be stored at room temperature (22-25°C). The Guaranteed shelf life is 12 months from the date of purchase.
Before Starting
Prepare all components and get all necessary materials ready by examining this instruction booklet and become familiar with each step.
Important
- RNaseA:It is stable for more than half a year when stored at room temperature. Spin down the RNase A vial briefly. Add the RNaseA solution to BufferA1 and mix well before use. Store at 4°C.
- Buffer B1 precipitates below room temperature. It is critical to warm up the buffer at 50°C to dissolve the precipitates before use.
- Buffer N3 may form precipitates below 10°C,warm up at 37°C to dissolve the precipitates before use.
- Keep the cap tightly closed for Buffer B1 after use.
- Make sure the availability of centrifuge(13,000rpm). Especially,after mixing the lysate with ethanol, the sample needs to be processed immediately by centrifugation.
- Carry out all centrifugations at room temperature.
Materials supplied by users
- 100% ethanol
- High-speed centrifuge
- 50mL high-speed centrifuge tubes
- 50mL conical tubes
- Isopropanol if precipitate the plasmid DNA.