Notebook:Federico Castro M/2008/01/08


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Proposed Procedure

 * Status: Pending for approval
 * Issues: None

I want to recover 4 biobricks in order to see their behavior. The biobricks are oscillators dependent on quorum sensing signals such as the one I wanted to assemble. These devises were designed during the IAP 2003 and it will be interesting to see whether or not they can coordinate a population in a syncronized way. I await for approval for this procedure.

Biobricks to be extracted


 * BBa_I4203 available at well 13K at iGEM 2007 Parts Kit Plate 1 in plasmid pSB1AK3
 * BBa_I4202 available at well 13I at iGEM 2007 Parts Kit Plate 1 in plasmid pSB1AK3
 * BBa_I4201available at well 13G at iGEM 2007 Parts Kit Plate 1 in plasmid pSB1AK3
 * BBa_I4200available at well 13E at iGEM 2007 Parts Kit Plate 1 in plasmid pSB1AK3

The following protocol is proposed for biobrick recovery from the iGEM page


 * 1) Puncture a hole through the foil with a pipette tip into the well that corresponds to the Biobrick™-standard part that you want
 * 2) Add 15 uL of diH2O (deionized water)
 * 3) Take 1uL DNA and transform into your desired competent cells, plate out on a plate with the correct antibiotic* and grow overnight. Your goal here is to obtain single colonies.

I intend to use the following protocol for transforming the biobricks into competent cells.
 * 1) Thaw 25 - 200 &mu;l TB buffer cells on ice. Do not use glass tubes, which adsorb DNA.
 * 2) Add DNA, pipette gently to mix (keep volume of DNA less than 5% of the cell volume)
 * 3) Incubate on ice for 30 minutes
 * 4) *Note: If you are in a rush, you can shorten this incubation time to 5-10 min.
 * 5) Incubate cells for 30 seconds at 42&deg;C.
 * 6) Incubate cells on ice for 2 min.
 * 7) Add 4 volumes of room temperature SOC (not critical)
 * 8) Incubate for 1 hour at 37&deg;C on shaker.
 * 9) *Note: Can also save some time here by reducing incubation to ~45 min.
 * 10) *Note: Step can be eliminated if plating on Amp plates, but not most other antibiotics
 * 11) Spread 100-300 &mu;l onto a plate made with appropriate antibiotic.
 * 12) Grow overnight at 37&deg;C.

Before the procedure I would need to prepare solid plates with Kanamicyn (all of them have resistance to Kanamycin). It seems that the proper concentration of Kanamicyn is 50 μg/mL.