Difference between revisions of "Bacterial Transformation : The Process"

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[[File:DSC_8120.jpg|200px|thumb|right|The four eppendorf tubes being cooled]]
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[[File:DSC_8120.jpg|200px|thumb|right|1.The four eppendorf tubes being cooled]]
1. 4 eppendorf tube were taken and marked lysis, p-tet, positive and negative.
+
[[File:DSC_8084.jpg|200px|thumb|left|2.The dry DNA being extracted]]
 
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# Four eppendorf tubes were taken and marked lysis, p-tet, +ve and -ve.
[[File:DSC_8120.jpg|200px|thumb|right|The dry DNA being extracted]]
+
# The dry DNA from the DNA Distribution Kit was extracted by mixing each part with 15 micro ml of water using a micro-pipette.
 
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# 2-3 micro ml of this plasmid solution was then added to  100 micro ml of DH 5-alpha E.Coli cells.
2. The dry DNA from the DNA Distribution Kit was extracted by mixing each part with 15 micro ml of water using a micro-pipette.
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# The positive control had the gene that promoted Ampicillin resistance and the negative control did not. If any colonies started forming in the negative control batch, that would mean the entire batch is contaminated
 
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# The bacteria were incubated in ice for 40 minutes, then given a heat shock for 30 seconds @ 42 degrees Celsius and then put in ice for 2-5 minutes. The heat shock causes tiny pores in the walls of the bacteria to expand, allowing the plasmids to go through.
3. 2-3 micro ml of this plasmid solution was then added to  100 micro ml of DH 5-alpha E.Coli cells.
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# They were mixed with 330 micro ml LB (Luria Bertani).
 
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# Left to grow for approximately an hour @ 37 degrees Celsius in the shaker.
4. The positive and negative marked tubes were also filled with control plasmids.
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# Centrifuged at room temperature for 3 minutes @ 8000 rpm.  
 
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# Discard 900 micro ml of the super-natured solution and dissolve pellets in remaining 100 micro ml. These were then spread on LB Agar plates containing 100 micro gram per ml Ampicillin.
5. The tubes were incubated in ice for 40 minutes, then given a heat shock for 30 seconds @ 42 degrees Celsius and then put in ice for 2-5 minutes.
+
#Plates were incubated at 37 degrees Celsius overnight.
 
 
6. They were mixed with 330 micro ml LB (Luria Bertani).
 
 
 
7. Left to grow for approximately an hour @ 37 degrees Celsius in the shaker.
 
 
 
8. Centrifuged at room temperature for 3 minutes @ 8000 rpm.  
 
 
 
9. Discard 900 micro ml of the super-natured solution and dissolve pellets in remaining 100 micro ml. These were then spread on LB Agar plates containing 100 micro gram per ml Ampicillin.
 
 
 
10.Plates were incubated at 37 degrees Celsius overnight.
 

Revision as of 19:52, 8 June 2009

1.The four eppendorf tubes being cooled
2.The dry DNA being extracted
  1. Four eppendorf tubes were taken and marked lysis, p-tet, +ve and -ve.
  2. The dry DNA from the DNA Distribution Kit was extracted by mixing each part with 15 micro ml of water using a micro-pipette.
  3. 2-3 micro ml of this plasmid solution was then added to 100 micro ml of DH 5-alpha E.Coli cells.
  4. The positive control had the gene that promoted Ampicillin resistance and the negative control did not. If any colonies started forming in the negative control batch, that would mean the entire batch is contaminated
  5. The bacteria were incubated in ice for 40 minutes, then given a heat shock for 30 seconds @ 42 degrees Celsius and then put in ice for 2-5 minutes. The heat shock causes tiny pores in the walls of the bacteria to expand, allowing the plasmids to go through.
  6. They were mixed with 330 micro ml LB (Luria Bertani).
  7. Left to grow for approximately an hour @ 37 degrees Celsius in the shaker.
  8. Centrifuged at room temperature for 3 minutes @ 8000 rpm.
  9. Discard 900 micro ml of the super-natured solution and dissolve pellets in remaining 100 micro ml. These were then spread on LB Agar plates containing 100 micro gram per ml Ampicillin.
  10. Plates were incubated at 37 degrees Celsius overnight.