Buffer G2

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Buffer G2 (digestion buffer) used for the QIAGEN Genomic-Tip DNA extraction protocol.

The buffer is used to resuspend spheroplasts and digest RNA and proteins.

Buffer G2

  • 800 mM guanidine HCl
  • 30 mM Tris·Cl, pH 8.0
  • 30 mM EDTA, pH 8.0
  • 5% Tween20
  • 0.5% Triton X-100


Buffer G2 should be stored at RT or 4°C.

To make G2:

  • In in 600 ml distilled water dissolve:
  • 76.42 g guanidine HCl
  • 11.17 g Na2EDTA·2H2O
  • 3.63 g Tris base
  • Add 250 ml 20% Tween-20 solution
  • 50 ml 10% Triton X-100 solution
  • Adjust the pH to 8.0 with NaOH
  • Adjust the volume to 1 liter with distilled water