Maloof Lab:Trizol

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Room 2115
Section of Plant Biology
1002 Life Sciences, One Shields Ave.
University of California Davis
Davis, CA 95616

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RNA extraction with TRIzol (invitrogen cat# 15596-026)


  1. Harvest 100 mg tissue (about 1 leaf) and flash freeze in liquid nitrogen
  2. Add 1ml TRIzol
  3. Homogenize and incubate at room temperature for 5 minutes
  4. Add 200μl chloroform and shake for 15 seconds
  5. Incubate 2 minutes at room temperature
  6. Centrifuge 12000 rpm for 15 minutes at 4°C
  7. Transfer aqueous phase to new tube containing 500μl isopropanol
  8. Incubate 10 minutes at room temperature
  9. Centrifuge 12000 rpm for 10 minutes at 4°C
  10. Discard supernatant and wash pellet in 1 ml 75% ethanol (made with DEPC water)
  11. Centrifuge at 7000 rpm for 5 minutes at 4°C
  12. Air dry for 10 minutes
  13. Resuspend in 30μl DEPC water
  14. Incubate 10 minutes at 55°C
  15. Store at -80°C

extra steps to have a cleaner sample
  1. After step 13 add 3μl NaOAc
  2. Add 60μl ethanol 100%
  3. Incubate at -80°C for 30 minutes
  4. centrifuge at maximum speed for 30 minutes at 4°C


1L DEPC water

  1. Add 1ml DEPC to 1L milli-Q water
  2. Let sit overnight
  3. Autoclave tha next day
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