Team:Cambridge/Experiments/Assembly of Reflectin Constructs

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==Construct Design==
 
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==Primer Design==
 
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We should mention expected lengths of products here.
 
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==Assembly: first attempt==
 
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===PCR===
 
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In the first round of PCR, we amplified fragments required for the assembly of GA1, GA2, GA3 and GA4 constructs.
 
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*We performed PCR using [[Team:Cambridge/Protocols/PCR#Reagents_used_in_PCR_reaction | Phusion Hot Start DNA Polymerase]] in 20 μl reaction volume.
 
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*The time profile used in the PCR machine was the following:
 
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{| border="1" align="center" style="text-align:center;"
 
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|scope="col" width="50" | '''Hold'''
 
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|
 
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|95°C
 
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|2 min
 
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|-
 
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|scope="col" width="50" rowspan="3" | '''Cycling'''
 
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|scope="col" width="80" | ''Denaturing''
 
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|scope="col" width="50" | 95°C
 
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|scope="col" width="50" | 10 s
 
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|-
 
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|scope="col" width="80" | ''Annealing''
 
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|scope="col" width="50" | 55°C
 
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|scope="col" width="50" | 20 s
 
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|-
 
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|scope="col" width="80" | ''Elongation''
 
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|scope="col" width="50" | 72°C
 
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|scope="col" width="50" | 150 s
 
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|}
 
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We decided to use the 55°C annealing temperaure, although the predicted temperature for most primers is 5-10°C higher, because of a low annealing temperature of the VF2 primer.
 
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*Primers and template DNA provided by our supervisor Paul served as a positive control, but eventually we did not detect any products on the gels.
 
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The pictures below present result of gel electrophoresis of PCR products.
 
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*In most cases position of a band matches the expected length of DNA fragment. The only exception are GA1-2 and GA3-2 products. According to the position on the gel the length of these DNA fragments is 4-5kb, whereas the predicted length is 3.5kb. Our hypothesis is that we were provided [http://partsregistry.org/Part:pSB1AK3 pSB1AK3] backbone instead of [http://partsregistry.org/Part:pSB1A3 pSB1A3]backbone.
 
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*For GA1-1, GA2-1, GA3-1 and GA4-1 we obtained two bands -
 
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*The molecular weight marker that we used in all gels is HyperLadder I, which produces regularly spaced bands ranging from 200 to 10,000bp.
 
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===Gibson Assembly===
 
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===Transformation===
 
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===Results===
 
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===Diagnostics===
 
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==Assembly: second attempt==
 
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===PCR===
 
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===Gibson Assembly===
 
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===Transformation===
 
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===Results===
 
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==What next?==
 
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Latest revision as of 14:46, 15 September 2011