IGEM:Peking/2007/Count:Conjugation

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*Setting up serial dilutions:original, 10-1, 10-2.
*Setting up serial dilutions:original, 10-1, 10-2.
*Pipette 200µL of each serial dilution onto an Double antibiotic plate.
*Pipette 200µL of each serial dilution onto an Double antibiotic plate.
-
===result===
+
==result==
*The frequency of transfer was expressed as the ratio (percentage) of the number of transconjugants to that of the donors.
*The frequency of transfer was expressed as the ratio (percentage) of the number of transconjugants to that of the donors.
==see also==
==see also==
[[IGEM:UC_Berkeley/2006/Conjugation]]
[[IGEM:UC_Berkeley/2006/Conjugation]]

Revision as of 07:21, 11 August 2007

Contents

Conjugation Test

  • choose the Donor cell and Recipient Cell which must be different Antibiotic.

Day1:

  1. Get the plates from -4 fridge:Donor, Recipient, Control.
  2. Amplification Culture in liquid LB for 12 hours.

day 2:

  1. put 2mL of culture into 20mL of LB with antibiotics, sub-culturing.

Donor

  1. Test OD600 after 30 minutes of sub-culturing, stop subculturing when OD600 reached 0.45~0.6(log phase).
  2. After sub-culturing decant the 500uL culture into a 1.5mL tube.
  3. spin down (top speed for 1 min), discard fluid.
  4. resuspend in 500mL LB(NO Antibiotic!), vortex.
  5. Repeat steps 3-4-3 in this order then progress to step 6.
  6. Re-suspend with 500mL LB.
  7. Place the cell suspension on ice.

Recipient

  1. decant the recipient cells(500uL culture into a 1.5mL tube) when reached the stationary phase.
  2. spin down (top speed for 1 min.), discard fluid.
  3. resuspend in 500mL LB(NO Antibiotic!), vortex.
  4. Repeat steps 3-4-3 in this order then progress to step 6.
  5. Re-suspend with 500mL LB.
  6. Place the cell suspension on ice.

mixing

  • Donor cells(log phase, include control) mixed with recipient cells(stationary phase).
  • Mix by vortexing.
  • culture in 37℃ for 90 minutes, 220rpm.

Plating

  • Setting up serial dilutions:original, 10-1, 10-2.
  • Pipette 200µL of each serial dilution onto an Double antibiotic plate.

result

  • The frequency of transfer was expressed as the ratio (percentage) of the number of transconjugants to that of the donors.

see also

IGEM:UC_Berkeley/2006/Conjugation

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