User:DrJones1935/18 July 2012

From 2012.igem.org

I. Agarose Gel Electrophoresis (AGE) of PCR Samples

  • Make Gel:
  • Measure out 0.5 g 0.50497 g of agarose and add to a 250 mL E-flask
  • Add 50 mL of 0.5x TBE buffer and swirl to mix
  • Cover flask with a Kimwipe and microwave for ~1 minute until clear
  • Allow to cool to ~60 oC and pour into beaker for ethidium bromide (EtBr)
  • Add 1 uL of EtBr stock to agarose and swirl to mix
  • Immediately pour gel into tray with combs
  • Allow to solidify, then remove the comb and tape and place the tray in the gel box with the wells closer to the black electrode
  • Make sure it is submerged in fresh TBE buffer
  • Load Gel:
  • Mix samples as drops on a piece of parafilm
  • Mix:
Ladder (NEB 2-log) Blank Sample
*5 uL DNA ladder
*1 uL 6x Loading Dye
*8.3 uL dH2O
*1.7 uL 6x Loading Dye
*6.3 uL dH2O
*1.7 uL 6x Loading Dye
*2.0 uL DNA
  • Load ~10 uL (except ladder which is ~6 uL) on gel according to the following chart:
Lane 1 2 3 4 5 6 7 8 9 10 11 12 13
NEB 2-log ladder Blank 1.1 1.2 2.1 2.2 3.1 3.2 4.1 4.2 5.1 5.2 NEB 2-log ladder
  • Store DNA at 4 oC
  • Run Gel:
  • Close gel box and turn on power pack
  • Run gel at 30 V for 20 min to stack gel
  • Run gel at 75 V until the markers have reached near the bottom of the gel
  • Image Gel:
  • RESULTS:
Srk 2012-07-18.jpg

Source: Media:Srk_2012-07-18.tif

Feature Expected Size (bp)
Leftover pBR322 4361
Leftover pBAV1K-T5-gfp 3653
pT5 promoter 107
LacZ 3137
CAT* 729
tetr 1246
T1 terminator 94

I think that this ladder is unreliable because it puts our plasmid templates in the range of 6000-10000 bp which is incorrect. If we translate the ladder accordingly, it could be that reactions 3, 4 and 5 were successful. I will run the gel again with a 100 bp ladder to check on them.

II. Agarose Gel Electrophoresis (AGE) of PCR Samples

  • Make Gel:
  • Measure out 0.5 g 0.503 g of agarose and add to a 250 mL E-flask
  • Add 50 mL of 0.5x TBE buffer and swirl to mix
  • Cover flask with a Kimwipe and microwave for ~1 minute until clear
  • Allow to cool to ~60 oC and pour into beaker for ethidium bromide (EtBr)
  • Add 1 uL of EtBr stock to agarose and swirl to mix
  • Immediately pour gel into tray with combs
  • Allow to solidify, then remove the comb and tape and place the tray in the gel box with the wells closer to the black electrode
  • Make sure it is submerged in TBE buffer
  • Load Gel:
  • Mix samples as drops on a piece of parafilm
  • Mix:
Ladder (100 bp ladder) Blank Sample
*Premixed from Isaacs Lab *8.3 uL dH2O
*1.7 uL 6x Loading Dye
*6.3 uL dH2O
*1.7 uL 6x Loading Dye
*2.0 uL DNA
  • Load ~10 uL (except ladder which is ~6 uL) on gel according to the following chart:
Lane 1 2 3 4 5 6 7 8 9 10 11 12
100 bp ladder Blank 1.1 1.2 2.1 2.2 3.1 3.2 4.1 4.2 5.1 5.2
  • Store DNA at 4 oC
  • Had a lot of trouble loading the gel due to my allergies. This may impact the quality of the image.
  • Run Gel:
  • Close gel box and turn on power pack
  • Run gel at 30 V for 25 min to stack gel
  • Run gel at 75 V until the markers have reached halfway down the gel
  • Image Gel:
  • RESULTS:
Srk 2012-07-18 2.jpg

Source: Media:Srk_2012-07-18_2.tif