Template:PhiC31 Assay Protocol

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  1. transform cells with plasmid containing phiC31 cds+attB/attP site Transformation Protocol
  2. inoculate and grow up a colony in 3ml media
  3. incubate with arabinose to a concentration of 1% arabinose for 15 minutes
  4. miniprep cells Miniprep Protocol
  5. transform purified plasmid into cells
  6. plate on selective media
  7. observe GFP expression
  8. select a white colony and inoculate it
  9. miniprep the grown up colony
  10. sequence the plasmid

Protocols

Transformation

  1. Thaw a 200 uL aliquot of cells on ice
  2. Add 50 uL of water to the cells
  3. Add 30 uL of KCM to the cells 
  4. Put your ligation mixture on ice, let cool a minute or two
  5. Add 70 uL of the cell cocktail to the ligation, stir to mix
  6. Let sit on ice for 10 min
  7. Heat shock for 90 seconds at 42 (longer incubation may work better)
  8. Put back on ice for 1 min
  9. Add 100uL of 2YT, let shake in the 37 degree incubator for 1 hour
 10. Plate 70+ uL on selective antibiotics, let incubate at 37 degrees overnight

Miniprep

1. Pellet around 1.5 mL or 2 mL saturated culture by spinning full speed, 30 seconds.
2. Dump supernatant, repeat to pellet another 1.5 mL (for a total of 3 mL)
3. Add 250uL of P1 buffer into each tube. Resuspend the cells using a vortexer.
4. Add 250uL of P2 buffer (a base that denatures everything and causes cells to lyse). Gently mix up and down. Solution should become clearer.
5. Add 350uL of N3 buffer (an acid of pH ~5 that causes cell junk - including protein and chromosomal DNA - to precipitate, and leaves plasmids and other small molecules in solution). Slowly invert a few times, then shake.
6. Spin in centrifuge at top speed for 5 minutes.
7. Label blue columns with an alcohol-resistant lab pen.
8. Pour liquid into columns, and place the columns into the centrifuge. Spin at 12000 rpm for 30 seconds.
9. Dump liquid out of the collectors under the columns (the DNA should be stuck to the white resin)
10. Wash each column with 500 uL of PB buffer.
11. Spin in centrifuge at 12000rpm for approximately 15 seconds, then flick out the liquid again.
12. Wash with 750uL of PE buffer (washes the salts off the resins).
13. Spin in centrifuge at 12000rpm for approximately 15 seconds and flick out liquid again.
14. Spin in centrifuge at full speed for 1 minute to dry off all water and ethanol.
15. Label new tubes and put columns in them.
16. Elute them by squirting 50uL of water down the middle of the column (don't let it stick to the sides).
17. Spin in centrifuge at top speed for 30 seconds.
18. Take out columns and cap the tubes.
19. Clean up - note the P1 buffer is stored at 4degC and all the rest at room temperature.
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