Koeris/Notebook/2007-1-19

From OpenWetWare

(Difference between revisions)
Jump to: navigation, search
(Restriction digest)
Line 60: Line 60:
*Use Qiagen PCR cleanup kit to remove salts and enzymes
*Use Qiagen PCR cleanup kit to remove salts and enzymes
*Digest PCR amplicons with KpnI, Hind III - double digest for 2h
*Digest PCR amplicons with KpnI, Hind III - double digest for 2h
 +
**Using Hind II might have been a mistake - a 200bp band showed up where it shouldn't have been -> heck cut sites.

Revision as of 19:22, 19 January 2007

Contents

DNA Fragment Purification from Acrylamide

Solutions

Crush and Soak Solution

  • 500 mM NH4OAc 3.3 g NH4OAc
  • 0.1% SDS 0.1 g SDS
  • 0.1 mM EDTA 20 ml 500 mM EDTA
  • up to 100 ml with Q
    • store at room temperature
  • 3 M NaOAc pH 5.2
  • 24.6 g anhydrous sodium acetate
  • pH to 5.2 with acetic acid and bring up to 100 ml with Q
    • store at room temperature

Other Reagents

  • DMCS treated glass wool (Alltech Assoc. Inc. #4037, 50 g)
  • 0.22 mm disposable micro tip filters (syringe type)
  • blue tips with melted tips to serve as pestle for crushing acrylamide

Procedure

  • Run a 4-6% acrylamide gel in 1X TBE, stain in EthBr (1-10 mg/ml) and cut out the desired band.
  • Crush the acrylamide with a p1000 tip with a melted end to resemble a pestle for the eppendorf "mortar."
  • Add 1 ml crush and soak solution and incubate overnight at 37° C.
  • Spin in the microfuge for 10 minutes at 14,000 rpm. Remove as much liquid as possible and add another 500 microliters of crush and soak solution.
  • Repeat the spin and pool the recovered supernatant.
  • Add 0.1 volume of 3M NaOAc, 2.5 volumes of EtOH and carrier (see above).
  • Spin as usual, wash and dry. Resuspend in 20 microliters TE.

Re-cloning of [His]6

Due to lack of material, I could not recover the A plasmid and have to re-clone it.

PCR set-up

  • 100 ul total reaction volume
  • 1ul template DNA @ ~40ng/ul
  • 200pmol primer mix
  • 97ul Taq SuperMix

Pipetting scheme

Labels in the respective field codes

Primer Tube Label
A his6 2F&R 200pmol A1
A his6 2F&R 200pmol A2

Thermal profile

  1. 92 deg C - 5min
  2. 92 deg C - 30s
  3. 50 deg C - 45s
  4. 72 deg C - 120s
  5. Cycle back to 2. 29X
  6. 72 deg C - 10min
  7. 4 deg C - indefinite

Gel image

Loaded 10ul, i.e. 10% of Rx on the gel; 10ul 2-log ladder as well

Restriction digest

  • Use Qiagen PCR cleanup kit to remove salts and enzymes
  • Digest PCR amplicons with KpnI, Hind III - double digest for 2h
    • Using Hind II might have been a mistake - a 200bp band showed up where it shouldn't have been -> heck cut sites.
Personal tools