Sauer:His6 ClpX purification: Difference between revisions
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*8. Decant Supernatant. Immediately Freeze at -80 | *8. Decant Supernatant. Immediately Freeze at -80 | ||
==Purification== | |||
Revision as of 08:43, 26 October 2007
Materials Needed
1000x AMP: 100mg/mL in 70% Ethanol 2 x 1L TB 1M ZnSO4 1M IPTG His-tagged ClpX strain: SJ01 LB
Protocol
Day One
- 1. Innoculate 25mL of LB-AMP with His-tagged ClpX strain.
- 2. Warn 2x 1L of TB in incubator or warm room at 37 overnight
Day Two
- 1. Add 1mL of 1000x AMP to each of the TB Flasks.
- 2. Innoculate each flask with 10mL of overnight culture
- 3. Grow at 37 C until OD is ~1-1.2 (should take ~>3hrs.)
- 4. Drop temperature of incubator to <RT
- 5. Add 15uL of ZnSO4
- 6. At OD of 1.7-2.0, induce with 0.25mM IPTG (250uL). Make sure flask is cooled to RT)
- 7. After 2-3 hrs. move to bottles and spin down in J6 at 4K/
- 8. Decant Supernatant. Immediately Freeze at -80
