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Team:Hawaii/Notebook/2008-07-28
From 2008.igem.org
| Projects | Events | Resources | ||
|---|---|---|---|---|
| Sponsors | Experiments | Milestones | Protocols | |
| Notebook (t) | Meetings (t) |
Things we did today
Wetlab work
Transformation
- Margaret
- Transformation of I14032 into Db3.1
Colony PCR
- Margaret
- Verifying the inserts of two I51020 (the base vector) and one colony of pSB1A7 (an insulated vector with high copy #)
PCR amplification of pRL1383a
- Margaret
- The omega region from pSMC121 and the rep/mob region are giving primer dimers and misamplification respectively. I am trying a gradient PCR from 49°C to 55°C to see if this will fix the problem.
PCR for BB-pRL1383a construction/verification
- Grace
- PCR of BB-pRL1383a (from plasmid prep) using VF2 & VR_B0034 primers to verify B0034 insert and MCS replacement
- PCR of B0034 with HindIII and BamHI primers in case we need to redo BB-pRL1383a construction
- Maintained everything on ice this time
- Used 0.5μl plasmid in PCR reaction
- Annealing at 55C
- Extension for 30 sec. at 72C
- Gel returned 3 bands + huge smear for B0034. Smear = lots of correct product. What are the three other bands (~120bp, ~170bp, ~200bp)?
- Gel gave two bands for BB-pRL1383a (~170bp, ~300bp)
- Will redo BB-pRL1383a construction using ccdB gene as insert/MCS
Plasmid preps
- Grace
- Resuspended plasmid preps in 30 μl TE and checked concentrations on nanodrop spectrometer
- nir+B0034 = 13.6 ng/μl
- GFP+B0024 = 9 ng/μl
- GFPf+B0024= 7.1 ng/μl
- BB-pRL1383a = 166.3 ng/μl
- Restriction digested nir+B0034 plasmid prep to verify insert (GFP and GFPf constructs were verified last week)
- Digested w/ EcoRI and SpeI so we can extract from gel if insert is correct
- Incubated at 37C for 2 hours
- Band way too big 1000+bp
- Need to redo
GFP(f) + tt constructs
- Grace
- Restriction digested GFP and GFPf w/ EcoRI and SpeI in 50 μl reactions for 3 hours
- Restriction digested B0024 (tt) with XbaI then EcoRI for 3 hours total
- Ran on an EtBr stained 3.8% agarose gel alongside GFP+B0024 ligation from 7/22 to see if ligation was successful (and the problem was with the colony we picked)
- GFPf+tt did not show a band ~800bp
- GFP ligation was okay the first time around (we picked a bad colony to plasmid prep?)
Reconstruction of assemblies
- Grace & Krystle
- PCR reaction to retrieve ccdB gene and BioBrick MCS from pSB1A3.
- Ran on gel to verify PCR product.
- Gel purified PCR product.
- RE digested overnight in 20 μl reactions (10μl DNA):
- pRL1383a with HindIII in NEBuffer 2
- ccdB+MCS with HindIII in NEBuffer 2
- GFP with EcoRI and SpeI in NEBuffer EcoRI + BSA
- GFP fusion with EcoRI and SpeI in NEBuffer EcoRI + BSA
- nir with EcoRI and SpeI in NEBuffer EcoRI + BSA
- rbs (B0030) with XbaI in NEBuffer 2 + BSA
- tt (B0024) with XbaI in NEBuffer 2 + BSA
Drylab Work
Primer Design
- Margaret
- I want to design primers for some replication proteins + origin from pSB2K3
Discussion
restriction digests
- the BamHI and HindIII enzymes we have are several years old, we need to remember to run undigested product as well to test if it is really cutting what we want to cut.
Quote of the Day
History is the only laboratory we have in which to test the consequences of thought. - Étienne Gilson
[http://manoa.hawaii.edu/ 
][http://manoa.hawaii.edu/ovcrge/ 
][http://www.ctahr.hawaii.edu 
]
