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| - | -Make plates with a thick layer of medium, 100 ml medium per big Petri dish.Medium of Streptomyces is mannitol soya flour medium (MS or SFM) 300 ml per 1L bottle to avoid boiling over in autoclave
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| - | *Agar 6 g
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| - | *D-mannitol 6 g
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| - | *Soya flour 6 g
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| - | *Demiwater 300ml
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| - | *Plating ΔrdeAB spores 10^5 /plate
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| - | -Incubate for 7 days at 30 °C
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| - |
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| - | -Harvest mycelium with razorblade
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| - | '''Cell wall isolation'''
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| - | -Scrape the mycelium with a razor blade and resuspend in 15 mL demi-water.
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| - | -Run this suspension throught the cell disrupter at 13 kpsi 6X:
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| - | *Clean all the parts off the cell distrupter with 70% ethanol, including the tower, make sure the nozzle is not blocked by running some ethanol through it.
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| - | *Let the loading cilinder and the nozzle rest in ice on aluminium foil for 5/10 minutes to cool them off(prevents protease activity later on).
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| - | *Filtrate your samples using a 10 mL surringe and the filter device, catch your filtrate in a clean greiner tube.
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| - | *Press the loading cilinder on the tower tightl (don't be to careful)
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| - | *Load '''no more than 15 mL''' of your '''filtered''' suspension
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| - | *Put on the nozzle and the lit of the nozzle, tightly
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| - | *The big cilinder can be placed on top of the nozzle/ loading cilinder, twist and turn to get it on and align the dent at the bottom of the cilinder with the dent on the french press
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| - | *Adjust your pressure to 13 kpsi
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| - | *Use the pin to start the machine, after two loud klblam!'s remove it
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| - | *Collect the distrupted cells( they are in the nozzle), using a surringe of 10 mL
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| - | *Run it through another 5X
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| - | *Collect your severely distrupted cells using the surringe, collect them in a greiner tube and put that on ice
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| - | *Clean all parts of the french style cell distrupter with 70% ethanol
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| - | -Cook in 2% SDS (spin off your French press samples- 5000 rpm and 5 min- then add 2% SDS)
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| - | -Spin off, 4000 rpm, 5 minutes: Use pellet
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| - | -Cook in 2% SDS
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| - | -Spin off,4000 rpm, 5 min: Use pellet
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| - | -Wash 10X with demi-water:
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| - | *Resuspend
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| - | *Spin off: Use pellet
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| - | *Etc.
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| - | -Freeze pellet (For freeze drying: free it well)
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| - | -Freeze dry your pellet
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| - | *Freeze the jar in which you will freeze dry your sample as well
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| - | *Turn on the machine, it needs to get on temperature and suck vacuum
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| - | Make sure all the valves are closed
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| - | The big red valve needs to be open
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| - | The machine is ready when temperature reaches -80 and stays stable
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| - | *Your greiner tube will be put in the jar with either a loose tube hood or parafilm to seal it off (prick 4 holes), seal the jar of with the rubber top
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| - | *Place the jar on one of the valves and open it up slowly
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| - | *When the sample is dry-freezed
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| - | Close the valve and remove the jar
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| - | Turn off the machine
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| - | Close the red valve
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| | '''Concentrations for antibiotics ''' | | '''Concentrations for antibiotics ''' |
Antibiotic Stock E.coli B.subtilis
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