Fragment Purification

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Fragment Purification from an Agarose Gel

Nucleospin Extract IIkit from Machery-Nagel

  1. With a plastic ruler cut band out of agarose gel and place in 1.5 microcentrifuge tube.
  2. Add 700 ul of buffer NTI and incubate at least 5 minutes in 55 C water bath, vortexing every minute until gel slice disappears.
  3. Incubate a dH20 in 55 C water bath for at later use.
  4. Transfer 700 ul to a Nucleospin Extract II column (NOT a miniprep column) on a collection tube and spin 30 seconds at full speed
  5. Dump the collection tube, transfer the remaining volume to the column, and spin 30 seconds.
  6. Dump collection tube and add 700 ul wash buffer NT3 (make sure ethanol has been added to the NT3 stock) to column, then spin 30 seconds.
  7. Repeat step 6.
  8. Dump collection tube and add 250 ul wash buffer NT3 to column, then spin 30 seconds.
  9. Repeat step 8.
  10. Dump the collection tube and spin the column at full speed for 1 minute to dry colum.
  11. Transfer to a NEW 1.5 ml tube.
  12. Add 12 ul heated dH2O directly to filter, let stand 30 seconds, and spin 30 seconds.
  13. Reapply the eluate onto the column, let stand 1 minute, spin 1 minute.
  14. Measure concentration on Nanodrop