Team:Newcastle/15 June 2010

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'''15 June 2010'''
=Miniprep Kit Using a Microcentrifuge=
=Miniprep Kit Using a Microcentrifuge=
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The Miniprep Kit is used to extract plasmid, which is the first thing that we did.
 
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# Resuspend pelleted bacterial cells in 250 μl Buffer P1 and transfer to a microcentrifuge tube.
 
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# Add 250 μl Buffer P2 and mix throughly by inverting the tube 4-6 times.
 
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# Add 350 μl Buffer N3 and mix immediately and thoroughly by inverting the tube 4-6 times.
 
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# Centrifuge for 10 min at 13,000 rpm in a table-top microcentrifuge.
 
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# Apply the supernatant to the QIAprep spin column by decanting or pipetting.
 
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# Centrifuge for 30-60s. Discard the flow-through.
 
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# Recommended: Wash the QIAprep spin column by adding 0.5 ml Buffer PB and centrifuging for 30-60s. Discard the flow-through.
 
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# Wash QIAprep spin column by adding 0.75 ml Buffer PE and centrifuging for 30-60s. 
 
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# Discard the flow-through, and centrifuge for an additional 1 min to remove residual wasg buffer.
 
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# To elute DNA, place the QIAprep column in a clean 1.5 ml microcentrifuge tube. Add 50 μl Buffer EB or water to the center of each QIAprep spin column, let stand for 1 min, and centrifuge for 1 min.
 
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=Nanodrop protocol=
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==Aim==
 +
To familiarise us to the technique of extracting plasmid DNA from ''E. coli'' DH5α cells by using a Miniprep kit from Qiagen.
 +
 
 +
==Protocol==
 +
Please refer to [[Team:Newcastle/Qiagen Minipreps|Qiagen Minipreps]] protocol.
 +
 
 +
=Nanodrop=
 +
 
 +
==Aim==
 +
To allow us to accurately measure the purity of DNA that has been extracted from ''E. coli'' DH5α cells using the Qiagen Midiprep kit.
 +
 
 +
==Protocol==
 +
 
 +
[[Image:Newcastle_Week_1_lab.JPG|300px|Steven trying out the nanodrop machine]]
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'''Figure 1''': Steven trying out the nanodrop machine.
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Please refer to: [[TeamNewcastleNanoDrop Spectrophotometer| Nanodrop Spectrophotometer]] protocol.
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=DNA Restriction Digestion=
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==Aim==
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DNA digestion is a technique that allow us to cut DNA at specific sites known as recognition sites which can be 4, 6 or 8 bp long. Therefore by running the digested plasmid or DNA on an agarose gel using gel electrophoresis, we will be able to correctly see the size of the DNA.
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Nanodrop can be used to measure the DNA, RNA and protein
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==Protocol==
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# Select Nanodrop program from the desktop
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Digestion was performed by using EcoRI and PstI as the prefix and suffix of the BBa_04450 biobrick.
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# To clean Nanodrop, add a drop of water on the spectrometer and press blank
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# After cleaning, wipe the water off
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# To equalizen the equipment, add 3 μl of the buffer used in the sample and press blank
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# Wipe the buffer off
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# To measure sample, add 3 μl of the sample and press measure
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# If dealing with multiple samples, clean the equipment with water at regular intervals
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# After measurement, clean the equipment with a drop of water on the spectrometer and press blank
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# 20 μl solution should be made in total: 15 μl plasmid (with GFP/RFP), 1 μl EcoRI, 1 μl PstI, 2 μl Buffer (10x), 1 μl water. '''NOTE:''' Digestive enzymes should never exceed 10% of the total volume.
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# Add the reagents in this order:
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##plasmid,
 +
##water,
 +
##buffer and
 +
##enzymes
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# Centrifuge for a few seconds to make sure that the mixture is at the bottom.
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# Heat block for 2 hours at 37°C.
=Gel electrophoresis=
=Gel electrophoresis=
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Gel electrophoresis can used to separate DNA, RNA, or protein molecules by molecular weight using an electric field applied to a gel matrix
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==Aims==
 +
Gel electrophoresis allow us to separate DNA, RNA, or protein molecules by molecular weight using an electric field applied to a gel matrix after the restriction digestion step (this step is only for DNA and RNA).
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# Make up 1% agarose gel (1g of agarose in 100 ml of TAE buffer) and transfer 60 ml of molten agarose gel into the gel tray with 3 μl of Safeview  
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==Protocol==
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# Wait for 30 min to allow the gel to harden
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# Make up 1% agarose gel (1g of agarose in 100 ml of TAE buffer) and transfer 60 ml of molten agarose gel into the gel tray after adding 3 μl of Safeview.
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# Transfer harden gel into the gel tank and add TAE buffer until the gel is completely submerge
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# Wait for 30 minutes to allow the gel to harden.
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# Depending on the nature of the sample, 3μl of GeneRuler™ 1kb Plus DNA Ladder was used for analysing DNA  
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# Transfer harden gel into the gel tank and add TAE buffer until the gel is completely submerged.
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# Loading buffer was then added together with the sample before loading onto the gel matrix
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# Depending on the nature of the sample, 3μl of GeneRuler™ 1kb Plus DNA Ladder was used for analysing the size of the DNA.
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# Run gel at 90V until separation is achieved and visualize using the gelDoc
+
# Loading buffer was then added together with the sample before loading onto the gel matrix.
 +
# Run gel at 90V until separation is achieved and visualize using the gelDoc apparatus.
{{Team:Newcastle/footer}}
{{Team:Newcastle/footer}}

Latest revision as of 20:47, 21 October 2010

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15 June 2010

Contents

Miniprep Kit Using a Microcentrifuge

Aim

To familiarise us to the technique of extracting plasmid DNA from E. coli DH5α cells by using a Miniprep kit from Qiagen.

Protocol

Please refer to Qiagen Minipreps protocol.

Nanodrop

Aim

To allow us to accurately measure the purity of DNA that has been extracted from E. coli DH5α cells using the Qiagen Midiprep kit.

Protocol

Steven trying out the nanodrop machine

Figure 1: Steven trying out the nanodrop machine.

Please refer to: Nanodrop Spectrophotometer protocol.

DNA Restriction Digestion

Aim

DNA digestion is a technique that allow us to cut DNA at specific sites known as recognition sites which can be 4, 6 or 8 bp long. Therefore by running the digested plasmid or DNA on an agarose gel using gel electrophoresis, we will be able to correctly see the size of the DNA.

Protocol

Digestion was performed by using EcoRI and PstI as the prefix and suffix of the BBa_04450 biobrick.

  1. 20 μl solution should be made in total: 15 μl plasmid (with GFP/RFP), 1 μl EcoRI, 1 μl PstI, 2 μl Buffer (10x), 1 μl water. NOTE: Digestive enzymes should never exceed 10% of the total volume.
  2. Add the reagents in this order:
    1. plasmid,
    2. water,
    3. buffer and
    4. enzymes
  3. Centrifuge for a few seconds to make sure that the mixture is at the bottom.
  4. Heat block for 2 hours at 37°C.

Gel electrophoresis

Aims

Gel electrophoresis allow us to separate DNA, RNA, or protein molecules by molecular weight using an electric field applied to a gel matrix after the restriction digestion step (this step is only for DNA and RNA).

Protocol

  1. Make up 1% agarose gel (1g of agarose in 100 ml of TAE buffer) and transfer 60 ml of molten agarose gel into the gel tray after adding 3 μl of Safeview.
  2. Wait for 30 minutes to allow the gel to harden.
  3. Transfer harden gel into the gel tank and add TAE buffer until the gel is completely submerged.
  4. Depending on the nature of the sample, 3μl of GeneRuler™ 1kb Plus DNA Ladder was used for analysing the size of the DNA.
  5. Loading buffer was then added together with the sample before loading onto the gel matrix.
  6. Run gel at 90V until separation is achieved and visualize using the gelDoc apparatus.
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