Team:NAIT Edmonton/TrialProtocols
Experimental Design
Go through our interactive experimental design flow chart! Many of our protocols are manufacturer specicfied; however, some are customized by us! PDFs of protocols can also be found
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SDS PAGE Protocol
Polyacrylamide Gels (10%)
Separating Gel
1) Level glass plates in the casting frame and place the frame within the casting stand.Ensure the plates are locked into place.
2) Place the following solutions in a 50ml falcon tube:
Mix
- 4.2ml DH20
- 2.5ml TRIS 4X Buffer.
- 3.3ml Polyacrylamide Solution.
3) Mix and invert six times
4) Add 33.3μl of APS (Ammonium Persulfate) into the falcon tube.
5) Mix and invert six times
6)Add 6.7μl of TEMED to the falcon tube. NOTE: MUST BE DONE IN A FUMEHOOD.TEMED IS TOXIC.
7) Mix and invert six times. Solution will harden in roughly 15 minutes.
8) Add solution in between glass plates using a pipette aid roughly 3/4 the way up the front plate.
9) Fill remaining space with ethanol to ensure an even leveling of the gel.
10) Once gel is solidified, remove the ethanol using a kim wipe ensuring the are in bewteen the plates is now dry.
Stacking Gel:
1) Place the following solutions in a 50ml falcon tube:
Mix
- 3.05ml DH20
- 1.25ml Stacking Buffer Solution
- 650μl Polyacrylamide Solution.
2) Mix and invert six times.
3) Add 25μl of APS ( Ammonium Persulfate ) into the falcon tube.
4) Mix and invert six times.
5) Add 5μl of TEMED to solution. NOTE: MUST BE DONE IN A FUMEHOOD.TEMED IS TOXIC.
6) Mix and invert six times.
7) Fill in the remaining area in between the glass plates with the stacking solution and place comb inside.
8) After gel is solidfied, remove from casting frame and place in plastic wrap. Store in the fridge.
READY FRO USE!
Electrophoresis
1) Prepare samples that will be ran in the gel electrophoresis.
2) Mix 15μl of each sample with 5μl of sample buffer solutiom. A 3 to 1 ratio is used. A maximum of 30μl can be inserted into each well.
3) Place glass plates in the electrode assembly and into the tank cell.
4) Fill tank with 1X electro buffer solution. Using a loading pipette and tips, load desired samples into wells along with a molecular weight ladder sample.
5) Connect the lid to the tank and place the correct cables onto the tank lid. Run gel at 120 volts for 60-90 minutes or until desired bands are about the length of the gel.
Silver Stain Plus Protocol
1) Once SDS-PAGE is complete, remove gels from the glass plates and remove the stacking gel layer
using a paper towel.
2) Place gel in a glass container, wash with 200ml distilled water for 5 minutes. Repeat the wash
step 4X. (shake gel back and forth in shaker) Decant water into waste container.
3) Mix a solution with 90ml of 10% acetic acid and 90ml of 10% methanol in a clean beaker. Add
10ml of fixative enhancer solution into the beaker and pour over the gel. Let sit for 20 minutes
on shaker, or up to a maximum of overnight, depending on the desired sensitivity of the gel.
4) Decant solution into a proper waste container.
5) Wash gel once again with 200ml of distilled water for 5 minutes on shaker. Repeat 4X. Decant
water into waste container.
6) Mix both parts of stain solution into two separate falcon tubes.
Mix 1
- 2.5ml of Silver Complex Solution
- 2.5ml of Reduction Moderator Solution
- 2.5ml of Image Development Reagent
- 17.5ml of DH20
Mix 2
- 1.25g of Development Accelerator
- 25ml of DH20
7) Mix both solutions together until each are dissolved, pour over gel. Let sit for up to 20 minutes
or until desired bands show.
8) Decant solution into proper waste container.
9) Prepare a stop solution containing 90ml of 10% acetic acid and 90ml of 10% methanol. Pour
over gel and shake for 15-20 minutes.
10) Decant solution into proper waste container.
11) Wash gel with 200ml of DH20 for 5 minutes on shaker. Repeat 2X.
GELS ARE STAINED!
