User:Jarle Pahr/Kits
Commercial kits for applications in molecular biology:
HisExpress protein purification columns: http://www.claremontbio.com/HisExpress_Protein_Purification_Columns_s/72.htm
(available at http://www.bioquote.com/product.php?id=291680)
PrepEase his-purification: http://www.affymetrix.com/estore/browse/brand/usb/product.jsp?navMode=34000&productId=131366&navAction=jump&aId=productsNav#1_1
Affinity chromatography products at Jena Bioscience: http://www.jenabioscience.com/cms/en/1/browse/1450_affinity_chromatography.html?gclid=CJCPmK6HvrUCFQtY3godFWEAtg
Kit | Use | Advantages | Disadvantages | Time | Experience |
---|---|---|---|---|---|
Promega Wizard SV miniprep | DNA isolation | Quick | Low yield | 45 - 60 min | |
Promega PureYield™ Plasmid Miniprep System | High-purity DNA isolation | ||||
Machery-Nagel NucleoBond Xtra Midi (midiprep) | DNA isolation | High yield (~20 ug), pure product. | Slow | 2 d | Yields of 100-140 ng/uL in 200 uL, for a total of about 20 ug. Yield may depend on skill in handling washing and resuspension of DNA pellet. Might be more efficient to do several (~10) parallel minipreps instead? |
Qiaquick gel extraction | DNA extraction from gel | Fast | Impure product | Impurities give absorbption peak at 230 nm in eluted product. | |
Qiaquick PCR purification | Purification of PCR products | Fast | 15 min | ||
QIAEX II gel extraction | DNA extraction from gel | Higher purity than qiaquick | Slower than Quiaquick | 1-5 h | Yield of about 200 ng from ~1.5 ug starting amount of plasmid. |
QIAGEN PCR Cloningplus Kit | Subcloning (TA cloning) | ? | ? | ? | |
Dongsheng Bio Eco-friendly Plasmid miniprep kit | DNA isolation | ? | - | ||
Dongsheng Bio PCR and DNA Fragment Purification Kit | Purification of PCR fragments | ? | |||
QiaAmp |
Notes:
Promega SV Wizard miniprep:
Observed plasmid yields:
Strain:Plasmid | Date | Culture volume incubated (mL) | Culture volume centrifuged (mL) | Medium /Antibiotic | Incubation vessel | Incubation time | OD600 | Elution volume (uL) | Obtained DNA concentration (ng/uL) | Total yield (ug) | Yield (ug / mL * OD600) | 260/280 | 260/230 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dh5a:rlig1 (pJP-1) | 21.5.13 | 10 mL | ~4.5 | LB + Kan 50 ug/mL | 50 mL tube | ~ 8h | ~2.2 | 50 | 49 | 2,45 | 0,25 | ||
Dh5a:rlig1 (pJP-1) | 21.5.13 | 10 mL | ~4.5 | LB + Kan 50 ug/mL | 50 mL tube | ~ 8h | ~2.2 | 50 | 35 | 1,75 | 0,18 | ||
Dh5a | 21.5.13 | ~3.5 | LB | 13 mL tube | 2.7 | ||||||||
Dh5a:pSB-M1g | 21.5.13 | ~4 | LB + Kan 50 ug/mL | 13 mL tube | 2.6 |
DongSheng Bio Eco friendly plasmid extraction kit:
Observed plasmid yields:
Strain:Plasmid | Date | Culture volume incubated (mL) | Culture volume centrifuged (mL) | Medium /Antibiotic | Incubation vessel | Incubation time | OD600 | Elution volume (uL) | Obtained DNA concentration (ng/uL) | Total yield (ug) | Yield (ug / mL * OD600) | 260/280 | 260/230 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Strain:Plasmid | Date | Culture vol inc | Culture vol centr | medium | incub vessel | incub time | OD600 | El. vol. | conc | tot | rel | 260/280 | 260/230 |
Qiaquick gel extraction kit:
Qiaex II: Use a thermomixer (high mixing, RPM ~ 500 ) to get constant mixing during incubation.
In vitro transcription kits:
https://www.neb.com/products/e2050-t7-quick-high-yield-rna-synthesis-kit