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Ligation of melanopsin into psb1-c3
ligation of psb1-c3 with melanopsin pcr amplicon. both digested w/ notI
ligation of psb1-c3 with melanopsin pcr amplicon. both digested w/ ecoRI and speI
Protocol: Ligation
Ligation is a method of combining several DNA fragments into a single plasmid. This is often the
step following a PCR (and a PCR cleanup) or a gel extraction. You can also do a "dirty" ligation, where you follow a certain number of digestions directly by a ligation.
- Download the following spreadsheet : File:Team-EPF-Lausanne Ligation.xls
- Fill in the pink areas with the vector and fragment concentration, their size and the ratio.
- Add all the suggested ingredients order in a microcentrifuge tube, in the order they appear.
- Ligate for 2 hours at 14ºC.
- Immediately transform competent bacteria with the ligation product.
Note: This protocol hasn't been optimized for blunt-end ligation (though it might still work).
Yesterday's maxiprep failed (no pellet).
Started another maxiprep of the Read-out plasmid.
Protocol: MaxiPrep
The evening before, take a big Erlenmeyer (at least 1L) and put 200ml LB in it. Add the appropriate antibiotics at the correct concentration (ampicilin: 200ul of 100mg/ml solution). Put in bacteria from a single colony of a freshly streaked plate or from a glycerol stock (warning: taking bacteria from glycerol stock seems to cause them to start growing later - due to thawing? - add one-two hours to the incubation time). Put them in the incubator for 14-15 hours (the contents of the bottle should be yellow-ish between translucid and opaque).
We then use the MaxiPrep kit (Plasmid DNA Purification kit) and protocol from Macherey-Nagel.
The complete handbook can be found [http://www.mn-net.com/Portals/8/attachments/Redakteure_Bio/Protocols/Plasmid%20DNA%20Purification/UM_pDNA_NuBo.pdf here]. We usually use the protocol that starts at page 24 for "Maxi".
