Team:Grenoble/Biology/Protocols/AND test

From 2012.igem.org

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         <li>Add 40 microliters to column 2, mix, and transfer 10 microliters to column 3.
         <li>Add 40 microliters to column 2, mix, and transfer 10 microliters to column 3.
         <li>Continue until column 5.
         <li>Continue until column 5.
 +
        <li>10 microliters of H2O to column 6.
 +
        <li>Transfer 5 microliters of column 1 to columns 1 and 2 of the reading plate.
 +
        <li>Continue until column 6 of the arabinose plate. This column goes in duplicate into columns 11 and 12 of the reading plate.
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Revision as of 14:54, 22 August 2012

iGEM Grenoble 2012

Project

"AND" gate test

control of pBAD expression by cAMP and arabinose.

Goal

Measure the dependence of the activity of the pBAD promoter on the concentrations of cAMP and arabinose.

Procedure

Outline

The day before: Grow BW25113 cya- containing the pAra/Bad_RBS_GFP plasmid of Alon in LB + Kanamycin. Leave on the shaker at 37°C until the next day morning.
Measure expression in different concentrations of arabinose and cAMP in M9 added with glucose, acetate or glycerol.

Protocol

Outline

Add 10 microliters of an appropriate mix of cAMP and arabinose to each well of a 96-well microplate (see plate layout below). Add 130 microliters of M9 into each well. The medium is prepared fresh, but not filtered. Then, add 10 microliters of the o/n culture and read in Fusion at 37°C.

cAMP: 0 to 3.2 mM: 0, 0.05, 0.1, 0.2, 0.4, 0.8, 1.6, 3.2 mM (dilution by 2-fold)

arabinose: 0 to 0.1%: 0.1, 0.02, 0.004, 0.0008, 0.00016, 0 % (5-fold dilutions)

Details

Make the cAMP gradient by serial dilution of a 100 mM solution.

  1. 10 microliters of 100 mM cAMP into all wells of row A.
  2. 5 microliters of H2O into all wells, except row A.
  3. Transfer 5 microliters sequentially from row A to row B, then B to C, etc. until row G. Mix at each step.
  4. Remove 5 microliters from row G.

Make the arabinose gradient by serial 5x dilution.

  1. 20 microliters of 3% arabinose into wells A1 to H1 of a new microplate.
  2. Transfer 10 microliters to column 2.
  3. Add 40 microliters to column 2, mix, and transfer 10 microliters to column 3.
  4. Continue until column 5.
  5. 10 microliters of H2O to column 6.
  6. Transfer 5 microliters of column 1 to columns 1 and 2 of the reading plate.
  7. Continue until column 6 of the arabinose plate. This column goes in duplicate into columns 11 and 12 of the reading plate.