Monday, December 23, 2024

Mouse tissue lysis for genotyping-PDF

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Material

  • proteinase K
  • Taq 10x buffer
  • tabletop shaker/incubator

Procedure

tissue lysis to release DNA

per tail or tissue chunk add (tissue degradation is sped up if tissue/tail is cut into smaller bits):

  • 100 µl Taq DNA polymerase 10x Reaction buffer with MgCl2 (e.g. Promega #M1883) diluted 1:10 in ddH2O
  • +2 µl proteinase K (20 mg/ml)
  • incubate for 3h to o/n at 50°C at 300 rpm
(proteinase K is stable over a broad pH range (4.0 to 12.5, optimum pH 8.0) and is also stable over the temperature range of 25 to 65°C)

proteinase K inactivation

  • 95°C for 10-20 min at 300 rpm
  • centrifuge at 13000 rpm for 3 min and transfer supernatant (80 µl) into new eppi

storage before PCR

  • 4°C short term, -20°C long term

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